90710091 has 48 divisors (see below), whose sum is σ = 145382400. Its totient is φ = 55783728.

The previous prime is 90710071. The next prime is 90710093. The reversal of 90710091 is 19001709.

It is not a de Polignac number, because 90710091 - 2⁹ = 90709579 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (90710093) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1148190 + ... + 1148268.

It is an arithmetic number, because the mean of its divisors is an integer number (3028800).

Almost surely, 2^90710091 is an apocalyptic number.

90710091 is a deficient number, since it is larger than the sum of its proper divisors (54672309).

90710091 is a wasteful number, since it uses less digits than its factorization.

90710091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 567, while the sum is 27.

The square root of 90710091 is about 9524.1845320216. The cubic root of 90710091 is about 449.3159830174.

The spelling of 90710091 in words is "ninety million, seven hundred ten thousand, ninety-one".