90910929287 has 2 divisors, whose sum is σ = 90910929288. Its totient is φ = 90910929286.

The previous prime is 90910929167. The next prime is 90910929301. The reversal of 90910929287 is 78292901909.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90910929287 - 2¹² = 90910925191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90910929887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45455464643 + 45455464644.

It is an arithmetic number, because the mean of its divisors is an integer number (45455464644).

Almost surely, 2^90910929287 is an apocalyptic number.

90910929287 is a deficient number, since it is larger than the sum of its proper divisors (1).

90910929287 is an equidigital number, since it uses as much as digits as its factorization.

90910929287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 56.

The spelling of 90910929287 in words is "ninety billion, nine hundred ten million, nine hundred twenty-nine thousand, two hundred eighty-seven".