8990431 has 2 divisors, whose sum is σ = 8990432. Its totient is φ = 8990430.

The previous prime is 8990413. The next prime is 8990441. The reversal of 8990431 is 1340998.

Together with previous prime (8990413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8990431 - 2⁹ = 8989919 is a prime.

It is a super-2 number, since 2×8990431² = 161655699131522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8990411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4495215 + 4495216.

It is an arithmetic number, because the mean of its divisors is an integer number (4495216).

Almost surely, 2^8990431 is an apocalyptic number.

8990431 is a deficient number, since it is larger than the sum of its proper divisors (1).

8990431 is an equidigital number, since it uses as much as digits as its factorization.

8990431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 8990431 is about 2998.4047425256. The cubic root of 8990431 is about 207.9346364514.

The spelling of 8990431 in words is "eight million, nine hundred ninety thousand, four hundred thirty-one".