90921700 has 18 divisors (see below), whose sum is σ = 197300306. Its totient is φ = 36368640.

The previous prime is 90921697. The next prime is 90921703. The reversal of 90921700 is 712909.

It is an interprime number because it is at equal distance from previous prime (90921697) and next prime (90921703).

It can be written as a sum of positive squares in 3 ways, for example, as 443556 + 90478144 = 666^2 + 9512^2 .

It is not an unprimeable number, because it can be changed into a prime (90921703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 454509 + ... + 454708.

Almost surely, 2^90921700 is an apocalyptic number.

It is an amenable number.

90921700 is an abundant number, since it is smaller than the sum of its proper divisors (106378606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90921700 is a wasteful number, since it uses less digits than its factorization.

90921700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909231 (or 909224 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 90921700 is about 9535.2870958351. The cubic root of 90921700 is about 449.6651006170.

The spelling of 90921700 in words is "ninety million, nine hundred twenty-one thousand, seven hundred".