90650431 has 2 divisors, whose sum is σ = 90650432. Its totient is φ = 90650430.

The previous prime is 90650423. The next prime is 90650437. The reversal of 90650431 is 13405609.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90650431 - 2³ = 90650423 is a prime.

It is a super-2 number, since 2×90650431² = 16435001280971522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90650431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90650437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45325215 + 45325216.

It is an arithmetic number, because the mean of its divisors is an integer number (45325216).

Almost surely, 2^90650431 is an apocalyptic number.

90650431 is a deficient number, since it is larger than the sum of its proper divisors (1).

90650431 is an equidigital number, since it uses as much as digits as its factorization.

90650431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 90650431 is about 9521.0519901952. The cubic root of 90650431 is about 449.2174564176.

The spelling of 90650431 in words is "ninety million, six hundred fifty thousand, four hundred thirty-one".