90409357 has 4 divisors (see below), whose sum is σ = 90428800. Its totient is φ = 90389916.

The previous prime is 90409339. The next prime is 90409369. The reversal of 90409357 is 75390409.

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.

It is a cyclic number.

It is not a de Polignac number, because 90409357 - 2⁷ = 90409229 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 (90409337) 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 3 ways as a sum of consecutive naturals, for example, 1828 + ... + 13570.

It is an arithmetic number, because the mean of its divisors is an integer number (22607200).

Almost surely, 2^90409357 is an apocalyptic number.

It is an amenable number.

90409357 is a deficient number, since it is larger than the sum of its proper divisors (19443).

90409357 is a wasteful number, since it uses less digits than its factorization.

90409357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19442.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 90409357 is about 9508.3835114072. The cubic root of 90409357 is about 448.8188894946.

The spelling of 90409357 in words is "ninety million, four hundred nine thousand, three hundred fifty-seven".