172873623 has 8 divisors (see below), whose sum is σ = 248228848. Its totient is φ = 106383744.

The previous prime is 172873579. The next prime is 172873693. The reversal of 172873623 is 326378271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172873623 - 2¹³ = 172865431 is a prime.

It is a super-2 number, since 2×172873623² = 59770579058292258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 4432657 = 172873623 / (1 + 7 + 2 + 8 + 7 + 3 + 6 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172873693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2216290 + ... + 2216367.

It is an arithmetic number, because the mean of its divisors is an integer number (31028606).

Almost surely, 2^172873623 is an apocalyptic number.

172873623 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

172873623 is a deficient number, since it is larger than the sum of its proper divisors (75355225).

172873623 is a wasteful number, since it uses less digits than its factorization.

172873623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4432673.

The product of its digits is 84672, while the sum is 39.

The square root of 172873623 is about 13148.1414275935. The cubic root of 172873623 is about 557.0697524350.

It can be divided in two parts, 17287 and 3623, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 172873623 in words is "one hundred seventy-two million, eight hundred seventy-three thousand, six hundred twenty-three".