97917725 has 18 divisors (see below), whose sum is σ = 124831854. Its totient is φ = 76190400.

The previous prime is 97917719. The next prime is 97917727. The reversal of 97917725 is 52771979.

It can be written as a sum of positive squares in 9 ways, for example, as 244036 + 97673689 = 494^2 + 9883^2 .

It is not a de Polignac number, because 97917725 - 2⁶ = 97917661 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97917725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97917727) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 32795 + ... + 35655.

It is an arithmetic number, because the mean of its divisors is an integer number (6935103).

Almost surely, 2^97917725 is an apocalyptic number.

It is an amenable number.

97917725 is a deficient number, since it is larger than the sum of its proper divisors (26914129).

97917725 is a wasteful number, since it uses less digits than its factorization.

97917725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945 (or 2903 counting only the distinct ones).

The product of its digits is 277830, while the sum is 47.

The square root of 97917725 is about 9895.3385490341. The cubic root of 97917725 is about 460.9145714344.

The spelling of 97917725 in words is "ninety-seven million, nine hundred seventeen thousand, seven hundred twenty-five".