90912032987 has 2 divisors, whose sum is σ = 90912032988. Its totient is φ = 90912032986.

The previous prime is 90912032971. The next prime is 90912032989. The reversal of 90912032987 is 78923021909.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90912032987 - 2⁴ = 90912032971 is a prime.

It is a super-2 number, since 2×90912032987² (a number of 23 digits) contains 22 as substring.

Together with 90912032989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90912032989) 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, 45456016493 + 45456016494.

It is an arithmetic number, because the mean of its divisors is an integer number (45456016494).

Almost surely, 2^90912032987 is an apocalyptic number.

90912032987 is a deficient number, since it is larger than the sum of its proper divisors (1).

90912032987 is an equidigital number, since it uses as much as digits as its factorization.

90912032987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 50.

The spelling of 90912032987 in words is "ninety billion, nine hundred twelve million, thirty-two thousand, nine hundred eighty-seven".