90115925 has 12 divisors (see below), whose sum is σ = 112214916. Its totient is φ = 71788800.

The previous prime is 90115919. The next prime is 90115933. The reversal of 90115925 is 52951109.

90115925 is nontrivially palindromic in base 4 and base 16.

It can be written as a sum of positive squares in 6 ways, for example, as 1737124 + 88378801 = 1318^2 + 9401^2 .

It is not a de Polignac number, because 90115925 - 2¹⁸ = 89853781 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 90115891 and 90115900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1454 + ... + 13503.

It is an arithmetic number, because the mean of its divisors is an integer number (9351243).

Almost surely, 2^90115925 is an apocalyptic number.

It is an amenable number.

90115925 is a deficient number, since it is larger than the sum of its proper divisors (22098991).

90115925 is a wasteful number, since it uses less digits than its factorization.

90115925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15208 (or 15203 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 32.

The square root of 90115925 is about 9492.9407982985. The cubic root of 90115925 is about 448.3328020459.

The spelling of 90115925 in words is "ninety million, one hundred fifteen thousand, nine hundred twenty-five".