91012075 has 24 divisors (see below), whose sum is σ = 140705280. Its totient is φ = 56733600.

The previous prime is 91012039. The next prime is 91012099. The reversal of 91012075 is 57021019.

It is not a de Polignac number, because 91012075 - 2¹⁷ = 90881003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21715 + ... + 25564.

It is an arithmetic number, because the mean of its divisors is an integer number (5862720).

Almost surely, 2^91012075 is an apocalyptic number.

91012075 is a deficient number, since it is larger than the sum of its proper divisors (49693205).

91012075 is a wasteful number, since it uses less digits than its factorization.

91012075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47307 (or 47302 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 91012075 is about 9540.0248951457. The cubic root of 91012075 is about 449.8140383887.

The spelling of 91012075 in words is "ninety-one million, twelve thousand, seventy-five".