90891373 has 4 divisors (see below), whose sum is σ = 92825280. Its totient is φ = 88957468.

The previous prime is 90891371. The next prime is 90891389. The reversal of 90891373 is 37319809.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90891373 - 2¹ = 90891371 is a prime.

It is a super-2 number, since 2×90891373² = 16522483371650258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90891371) 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, 966883 + ... + 966976.

It is an arithmetic number, because the mean of its divisors is an integer number (23206320).

Almost surely, 2^90891373 is an apocalyptic number.

It is an amenable number.

90891373 is a deficient number, since it is larger than the sum of its proper divisors (1933907).

90891373 is a wasteful number, since it uses less digits than its factorization.

90891373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933906.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 90891373 is about 9533.6967121888. The cubic root of 90891373 is about 449.6150996821.

The spelling of 90891373 in words is "ninety million, eight hundred ninety-one thousand, three hundred seventy-three".