172987743 has 8 divisors (see below), whose sum is σ = 231009408. Its totient is φ = 115145624.

The previous prime is 172987739. The next prime is 172987747. The reversal of 172987743 is 347789271.

It is an interprime number because it is at equal distance from previous prime (172987739) and next prime (172987747).

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

It is a cyclic number.

It is not a de Polignac number, because 172987743 - 2² = 172987739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172987692 and 172987701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172987747) 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, 42621 + ... + 46502.

It is an arithmetic number, because the mean of its divisors is an integer number (28876176).

Almost surely, 2^172987743 is an apocalyptic number.

172987743 is a deficient number, since it is larger than the sum of its proper divisors (58021665).

172987743 is an equidigital number, since it uses as much as digits as its factorization.

172987743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89773.

The product of its digits is 592704, while the sum is 48.

The square root of 172987743 is about 13152.4804884858. The cubic root of 172987743 is about 557.1923059614.

The spelling of 172987743 in words is "one hundred seventy-two million, nine hundred eighty-seven thousand, seven hundred forty-three".