90403971 has 36 divisors (see below), whose sum is σ = 143381448. Its totient is φ = 50516928.

The previous prime is 90403969. The next prime is 90403981. The reversal of 90403971 is 17930409.

It is not a de Polignac number, because 90403971 - 2¹ = 90403969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90403921) 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 35 ways as a sum of consecutive naturals, for example, 659815 + ... + 659951.

It is an arithmetic number, because the mean of its divisors is an integer number (3982818).

Almost surely, 2^90403971 is an apocalyptic number.

90403971 is a deficient number, since it is larger than the sum of its proper divisors (52977477).

90403971 is a wasteful number, since it uses less digits than its factorization.

90403971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 90403971 is about 9508.1002834425. The cubic root of 90403971 is about 448.8099767499.

The spelling of 90403971 in words is "ninety million, four hundred three thousand, nine hundred seventy-one".