90909083 has 4 divisors (see below), whose sum is σ = 90931680. Its totient is φ = 90886488.

The previous prime is 90909073. The next prime is 90909089. The reversal of 90909083 is 38090909.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90909083 - 2¹⁸ = 90646939 is a prime.

It is a super-2 number, since 2×90909083² = 16528922743801778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90909089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3443 + ... + 13916.

It is an arithmetic number, because the mean of its divisors is an integer number (22732920).

Almost surely, 2^90909083 is an apocalyptic number.

90909083 is a deficient number, since it is larger than the sum of its proper divisors (22597).

90909083 is a wasteful number, since it uses less digits than its factorization.

90909083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22596.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 90909083 is about 9534.6254776997. The cubic root of 90909083 is about 449.6442999829.

It can be divided in two parts, 909090 and 83, that multiplied together give a triangular number (75454470 = T₁₂₂₈₄).

The spelling of 90909083 in words is "ninety million, nine hundred nine thousand, eighty-three".