90727857 has 30 divisors (see below), whose sum is σ = 148988994. Its totient is φ = 54980640.

The previous prime is 90727853. The next prime is 90727867. The reversal of 90727857 is 75872709.

It can be written as a sum of positive squares in only one way, i.e., 56610576 + 34117281 = 7524^2 + 5841^2 .

It is not a de Polignac number, because 90727857 - 2² = 90727853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90727853) 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 29 ways as a sum of consecutive naturals, for example, 5173 + ... + 14429.

Almost surely, 2^90727857 is an apocalyptic number.

It is an amenable number.

90727857 is a deficient number, since it is larger than the sum of its proper divisors (58261137).

90727857 is a wasteful number, since it uses less digits than its factorization.

90727857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9291 (or 9271 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 45.

The square root of 90727857 is about 9525.1171646337. The cubic root of 90727857 is about 449.3453146555.

The spelling of 90727857 in words is "ninety million, seven hundred twenty-seven thousand, eight hundred fifty-seven".