97129172 has 18 divisors (see below), whose sum is σ = 197727642. Its totient is φ = 41626704.

The previous prime is 97129133. The next prime is 97129243. The reversal of 97129172 is 27192179.

It can be written as a sum of positive squares in only one way, i.e., 51782416 + 45346756 = 7196^2 + 6734^2 .

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, 247583 + ... + 247974.

It is an arithmetic number, because the mean of its divisors is an integer number (10984869).

Almost surely, 2^97129172 is an apocalyptic number.

It is an amenable number.

97129172 is an abundant number, since it is smaller than the sum of its proper divisors (100598470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97129172 is a wasteful number, since it uses less digits than its factorization.

97129172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495575 (or 495566 counting only the distinct ones).

The product of its digits is 15876, while the sum is 38.

The square root of 97129172 is about 9855.4133348125. The cubic root of 97129172 is about 459.6739529481.

The spelling of 97129172 in words is "ninety-seven million, one hundred twenty-nine thousand, one hundred seventy-two".