90920093 has 4 divisors (see below), whose sum is σ = 99185568. Its totient is φ = 82654620.

The previous prime is 90920077. The next prime is 90920107. The reversal of 90920093 is 39002909.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39002909 = 11 ⋅3545719.

It is a cyclic number.

It is not a de Polignac number, because 90920093 - 2⁴ = 90920077 is a prime.

It is a super-2 number, since 2×90920093² = 16532926622257298, 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 (90920023) 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, 4132721 + ... + 4132742.

It is an arithmetic number, because the mean of its divisors is an integer number (24796392).

Almost surely, 2^90920093 is an apocalyptic number.

It is an amenable number.

90920093 is a deficient number, since it is larger than the sum of its proper divisors (8265475).

90920093 is a wasteful number, since it uses less digits than its factorization.

90920093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8265474.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 90920093 is about 9535.2028295155. The cubic root of 90920093 is about 449.6624513921.

The spelling of 90920093 in words is "ninety million, nine hundred twenty thousand, ninety-three".