90621093 has 8 divisors (see below), whose sum is σ = 120940768. Its totient is φ = 60357744.

The previous prime is 90621079. The next prime is 90621119. The reversal of 90621093 is 39012609.

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

It is not a de Polignac number, because 90621093 - 2⁸ = 90620837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90621093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90621023) 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, 10171 + ... + 16872.

It is an arithmetic number, because the mean of its divisors is an integer number (15117596).

Almost surely, 2^90621093 is an apocalyptic number.

It is an amenable number.

90621093 is a deficient number, since it is larger than the sum of its proper divisors (30319675).

90621093 is a wasteful number, since it uses less digits than its factorization.

90621093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28163.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 90621093 is about 9519.5111744249. The cubic root of 90621093 is about 449.1689897837.

The spelling of 90621093 in words is "ninety million, six hundred twenty-one thousand, ninety-three".