90291468931 has 2 divisors, whose sum is σ = 90291468932. Its totient is φ = 90291468930.

The previous prime is 90291468889. The next prime is 90291468983. The reversal of 90291468931 is 13986419209.

It is an a-pointer prime, because the next prime (90291468983) can be obtained adding 90291468931 to its sum of digits (52).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90291468931 - 2¹¹ = 90291466883 is a prime.

It is a super-2 number, since 2×90291468931² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90291468731) 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, 45145734465 + 45145734466.

It is an arithmetic number, because the mean of its divisors is an integer number (45145734466).

Almost surely, 2^90291468931 is an apocalyptic number.

90291468931 is a deficient number, since it is larger than the sum of its proper divisors (1).

90291468931 is an equidigital number, since it uses as much as digits as its factorization.

90291468931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 52.

The spelling of 90291468931 in words is "ninety billion, two hundred ninety-one million, four hundred sixty-eight thousand, nine hundred thirty-one".