91135025 has 12 divisors (see below), whose sum is σ = 114557772. Its totient is φ = 71907840.

The previous prime is 91135007. The next prime is 91135043. The reversal of 91135025 is 52053119.

It is an interprime number because it is at equal distance from previous prime (91135007) and next prime (91135043).

It can be written as a sum of positive squares in 6 ways, for example, as 6071296 + 85063729 = 2464^2 + 9223^2 .

It is a de Polignac number, because none of the positive numbers 2^k-91135025 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91134985 and 91135003.

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, 23144 + ... + 26793.

It is an arithmetic number, because the mean of its divisors is an integer number (9546481).

Almost surely, 2^91135025 is an apocalyptic number.

It is an amenable number.

91135025 is a deficient number, since it is larger than the sum of its proper divisors (23422747).

91135025 is a wasteful number, since it uses less digits than its factorization.

91135025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50020 (or 50015 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 91135025 is about 9546.4666238352. The cubic root of 91135025 is about 450.0165014525.

The spelling of 91135025 in words is "ninety-one million, one hundred thirty-five thousand, twenty-five".