90459393 has 16 divisors (see below), whose sum is σ = 123802560. Its totient is φ = 58728384.

The previous prime is 90459373. The next prime is 90459403. The reversal of 90459393 is 39395409.

It is a happy number.

It is not a de Polignac number, because 90459393 - 2⁹ = 90458881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90459353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20055 + ... + 24147.

It is an arithmetic number, because the mean of its divisors is an integer number (7737660).

Almost surely, 2^90459393 is an apocalyptic number.

It is an amenable number.

90459393 is a deficient number, since it is larger than the sum of its proper divisors (33343167).

90459393 is a wasteful number, since it uses less digits than its factorization.

90459393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4288.

The product of its (nonzero) digits is 131220, while the sum is 42.

The square root of 90459393 is about 9511.0142992217. The cubic root of 90459393 is about 448.9016720778.

The spelling of 90459393 in words is "ninety million, four hundred fifty-nine thousand, three hundred ninety-three".