172697108 has 12 divisors (see below), whose sum is σ = 307922580. Its totient is φ = 84719232.

The previous prime is 172697089. The next prime is 172697141. The reversal of 172697108 is 801796271.

It can be written as a sum of positive squares in 2 ways, for example, as 147816964 + 24880144 = 12158^2 + 4988^2 .

It is a super-2 number, since 2×172697108² = 59648582223127328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407093 + ... + 407516.

It is an arithmetic number, because the mean of its divisors is an integer number (25660215).

Almost surely, 2^172697108 is an apocalyptic number.

It is an amenable number.

172697108 is a deficient number, since it is larger than the sum of its proper divisors (135225472).

172697108 is a wasteful number, since it uses less digits than its factorization.

172697108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814666 (or 814664 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 41.

The square root of 172697108 is about 13141.4271675492. The cubic root of 172697108 is about 556.8800866122.

The spelling of 172697108 in words is "one hundred seventy-two million, six hundred ninety-seven thousand, one hundred eight".