172136902 has 12 divisors (see below), whose sum is σ = 300361500. Its totient is φ = 73772916.

The previous prime is 172136897. The next prime is 172136929. The reversal of 172136902 is 209631271.

It is a super-2 number, since 2×172136902² = 59262226060315208, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 878152 + ... + 878347.

It is an arithmetic number, because the mean of its divisors is an integer number (25030125).

Almost surely, 2^172136902 is an apocalyptic number.

172136902 is a deficient number, since it is larger than the sum of its proper divisors (128224598).

172136902 is a wasteful number, since it uses less digits than its factorization.

172136902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756515 (or 1756508 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 172136902 is about 13120.0953502633. The cubic root of 172136902 is about 556.2772865123.

The spelling of 172136902 in words is "one hundred seventy-two million, one hundred thirty-six thousand, nine hundred two".