90091700 has 18 divisors (see below), whose sum is σ = 195499206. Its totient is φ = 36036640.

The previous prime is 90091699. The next prime is 90091733. The reversal of 90091700 is 719009.

90091700 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 18079504 + 72012196 = 4252^2 + 8486^2 .

It is a super-4 number, since 4×90091700⁴ (a number of 33 digits) contains 4444 as substring.

90091700 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 90091700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 450359 + ... + 450558.

It is an arithmetic number, because the mean of its divisors is an integer number (10861067).

Almost surely, 2^90091700 is an apocalyptic number.

It is an amenable number.

90091700 is an abundant number, since it is smaller than the sum of its proper divisors (105407506).

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

90091700 is a wasteful number, since it uses less digits than its factorization.

90091700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900931 (or 900924 counting only the distinct ones).

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 90091700 is about 9491.6647644130. The cubic root of 90091700 is about 448.2926247762.

The spelling of 90091700 in words is "ninety million, ninety-one thousand, seven hundred".