172083997 has 4 divisors (see below), whose sum is σ = 172110816. Its totient is φ = 172057180.

The previous prime is 172083991. The next prime is 172084009. The reversal of 172083997 is 799380271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 799380271 = 1753 ⋅456007.

It is a cyclic number.

It is not a de Polignac number, because 172083997 - 2⁷ = 172083869 is a prime.

It is a super-2 number, since 2×172083997² = 59225804046992018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172083991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2538 + ... + 18724.

It is an arithmetic number, because the mean of its divisors is an integer number (43027704).

Almost surely, 2^172083997 is an apocalyptic number.

It is an amenable number.

172083997 is a deficient number, since it is larger than the sum of its proper divisors (26819).

172083997 is a wasteful number, since it uses less digits than its factorization.

172083997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26818.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 172083997 is about 13118.0790133312. The cubic root of 172083997 is about 556.2202914403.

The spelling of 172083997 in words is "one hundred seventy-two million, eighty-three thousand, nine hundred ninety-seven".