90431459 has 4 divisors (see below), whose sum is σ = 90586104. Its totient is φ = 90276816.

The previous prime is 90431447. The next prime is 90431477. The reversal of 90431459 is 95413409.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90431459 - 2²⁰ = 89382883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90433459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76442 + ... + 77615.

It is an arithmetic number, because the mean of its divisors is an integer number (22646526).

Almost surely, 2^90431459 is an apocalyptic number.

90431459 is a deficient number, since it is larger than the sum of its proper divisors (154645).

90431459 is a wasteful number, since it uses less digits than its factorization.

90431459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154644.

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

The square root of 90431459 is about 9509.5456778965. The cubic root of 90431459 is about 448.8554601446.

The spelling of 90431459 in words is "ninety million, four hundred thirty-one thousand, four hundred fifty-nine".