90731853 has 8 divisors (see below), whose sum is σ = 134417600. Its totient is φ = 60487884.

The previous prime is 90731819. The next prime is 90731863. The reversal of 90731853 is 35813709.

It is not a de Polignac number, because 90731853 - 2¹⁷ = 90600781 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90731863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1680193 + ... + 1680246.

It is an arithmetic number, because the mean of its divisors is an integer number (16802200).

Almost surely, 2^90731853 is an apocalyptic number.

It is an amenable number.

90731853 is a deficient number, since it is larger than the sum of its proper divisors (43685747).

90731853 is a wasteful number, since it uses less digits than its factorization.

90731853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360448 (or 3360442 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 90731853 is about 9525.3269235234. The cubic root of 90731853 is about 449.3519115177.

The spelling of 90731853 in words is "ninety million, seven hundred thirty-one thousand, eight hundred fifty-three".