90544391 has 8 divisors (see below), whose sum is σ = 103653024. Its totient is φ = 77479200.

The previous prime is 90544387. The next prime is 90544427. The reversal of 90544391 is 19344509.

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 90544391 - 2² = 90544387 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 (90544331) 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, 6260 + ... + 14841.

It is an arithmetic number, because the mean of its divisors is an integer number (12956628).

Almost surely, 2^90544391 is an apocalyptic number.

90544391 is a deficient number, since it is larger than the sum of its proper divisors (13108633).

90544391 is a wasteful number, since it uses less digits than its factorization.

90544391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21721.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 90544391 is about 9515.4816483455. The cubic root of 90544391 is about 449.0422279618.

The spelling of 90544391 in words is "ninety million, five hundred forty-four thousand, three hundred ninety-one".