90431963 has 4 divisors (see below), whose sum is σ = 95191560. Its totient is φ = 85672368.

The previous prime is 90431941. The next prime is 90431981. The reversal of 90431963 is 36913409.

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

It is not a de Polignac number, because 90431963 - 2¹² = 90427867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90431923) 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, 2379770 + ... + 2379807.

It is an arithmetic number, because the mean of its divisors is an integer number (23797890).

Almost surely, 2^90431963 is an apocalyptic number.

90431963 is a deficient number, since it is larger than the sum of its proper divisors (4759597).

90431963 is a wasteful number, since it uses less digits than its factorization.

90431963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4759596.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 90431963 is about 9509.5721775483. The cubic root of 90431963 is about 448.8562940090.

The spelling of 90431963 in words is "ninety million, four hundred thirty-one thousand, nine hundred sixty-three".