90744421 has 8 divisors (see below), whose sum is σ = 91735040. Its totient is φ = 89758368.

The previous prime is 90744397. The next prime is 90744449. The reversal of 90744421 is 12444709.

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 90744421 - 2²¹ = 88647269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90741421) 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, 51070 + ... + 52816.

It is an arithmetic number, because the mean of its divisors is an integer number (11466880).

Almost surely, 2^90744421 is an apocalyptic number.

It is an amenable number.

90744421 is a deficient number, since it is larger than the sum of its proper divisors (990619).

90744421 is a wasteful number, since it uses less digits than its factorization.

90744421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2283.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 90744421 is about 9525.9866155690. The cubic root of 90744421 is about 449.3726583444.

The spelling of 90744421 in words is "ninety million, seven hundred forty-four thousand, four hundred twenty-one".