90864705 has 16 divisors (see below), whose sum is σ = 145526400. Its totient is φ = 48413568.

The previous prime is 90864701. The next prime is 90864727. The reversal of 90864705 is 50746809.

It is not a de Polignac number, because 90864705 - 2² = 90864701 is a prime.

It is a super-2 number, since 2×90864705² = 16512789229474050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90864701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17221 + ... + 21869.

It is an arithmetic number, because the mean of its divisors is an integer number (9095400).

Almost surely, 2^90864705 is an apocalyptic number.

It is an amenable number.

90864705 is a deficient number, since it is larger than the sum of its proper divisors (54661695).

90864705 is a wasteful number, since it uses less digits than its factorization.

90864705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5960.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 90864705 is about 9532.2979915653. The cubic root of 90864705 is about 449.5711222471.

The spelling of 90864705 in words is "ninety million, eight hundred sixty-four thousand, seven hundred five".