90435131 has 2 divisors, whose sum is σ = 90435132. Its totient is φ = 90435130.

The previous prime is 90435127. The next prime is 90435151. The reversal of 90435131 is 13153409.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90435131 - 2² = 90435127 is a prime.

It is a super-2 number, since 2×90435131² = 16357025837974322, which contains 22 as substring.

It is a Chen prime.

It is equal to p_5240825 and since 90435131 and 5240825 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90435131.

It is not a weakly prime, because it can be changed into another prime (90435151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45217565 + 45217566.

It is an arithmetic number, because the mean of its divisors is an integer number (45217566).

Almost surely, 2^90435131 is an apocalyptic number.

90435131 is a deficient number, since it is larger than the sum of its proper divisors (1).

90435131 is an equidigital number, since it uses as much as digits as its factorization.

90435131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 90435131 is about 9509.7387450970. The cubic root of 90435131 is about 448.8615353716.

The spelling of 90435131 in words is "ninety million, four hundred thirty-five thousand, one hundred thirty-one".