90783172 has 12 divisors (see below), whose sum is σ = 159624976. Its totient is φ = 45176040.

The previous prime is 90783151. The next prime is 90783193. The reversal of 90783172 is 27138709.

It is an interprime number because it is at equal distance from previous prime (90783151) and next prime (90783193).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52938 + ... + 54625.

Almost surely, 2^90783172 is an apocalyptic number.

It is an amenable number.

90783172 is a deficient number, since it is larger than the sum of its proper divisors (68841804).

90783172 is a wasteful number, since it uses less digits than its factorization.

90783172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107778 (or 107776 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 90783172 is about 9528.0203610194. The cubic root of 90783172 is about 449.4366151200.

The spelling of 90783172 in words is "ninety million, seven hundred eighty-three thousand, one hundred seventy-two".