90091373 has 4 divisors (see below), whose sum is σ = 90232128. Its totient is φ = 89950620.

The previous prime is 90091367. The next prime is 90091427. The reversal of 90091373 is 37319009.

It is a happy number.

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 90091373 - 2¹⁰ = 90090349 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 (90091333) 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, 69413 + ... + 70698.

It is an arithmetic number, because the mean of its divisors is an integer number (22558032).

Almost surely, 2^90091373 is an apocalyptic number.

It is an amenable number.

90091373 is a deficient number, since it is larger than the sum of its proper divisors (140755).

90091373 is a wasteful number, since it uses less digits than its factorization.

90091373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140754.

The product of its (nonzero) digits is 5103, while the sum is 32.

The square root of 90091373 is about 9491.6475387574. The cubic root of 90091373 is about 448.2920823959.

The spelling of 90091373 in words is "ninety million, ninety-one thousand, three hundred seventy-three".