90293021 has 8 divisors (see below), whose sum is σ = 111129984. Its totient is φ = 71440560.

The previous prime is 90293011. The next prime is 90293033. The reversal of 90293021 is 12039209.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90293021 - 2²² = 86098717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90293011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496025 + ... + 496206.

It is an arithmetic number, because the mean of its divisors is an integer number (13891248).

Almost surely, 2^90293021 is an apocalyptic number.

90293021 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

90293021 is a deficient number, since it is larger than the sum of its proper divisors (20836963).

90293021 is a wasteful number, since it uses less digits than its factorization.

90293021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992251.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 90293021 is about 9502.2639933860. The cubic root of 90293021 is about 448.6262980498.

The spelling of 90293021 in words is "ninety million, two hundred ninety-three thousand, twenty-one".