90670705 has 16 divisors (see below), whose sum is σ = 111024144. Its totient is φ = 71066880.

The previous prime is 90670693. The next prime is 90670729. The reversal of 90670705 is 50707609.

It can be written as a sum of positive squares in 8 ways, for example, as 11175649 + 79495056 = 3343^2 + 8916^2 .

It is not a de Polignac number, because 90670705 - 2²⁵ = 57116273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113367 + ... + 114163.

It is an arithmetic number, because the mean of its divisors is an integer number (6939009).

Almost surely, 2^90670705 is an apocalyptic number.

It is an amenable number.

90670705 is a deficient number, since it is larger than the sum of its proper divisors (20353439).

90670705 is a wasteful number, since it uses less digits than its factorization.

90670705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 90670705 is about 9522.1166239445. The cubic root of 90670705 is about 449.2509431340.

The spelling of 90670705 in words is "ninety million, six hundred seventy thousand, seven hundred five".