90087669929 has 2 divisors, whose sum is σ = 90087669930. Its totient is φ = 90087669928.

The previous prime is 90087669923. The next prime is 90087669937. The reversal of 90087669929 is 92996678009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68828571904 + 21259098025 = 262352^2 + 145805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90087669929 is a prime.

It is not a weakly prime, because it can be changed into another prime (90087669923) 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, 45043834964 + 45043834965.

It is an arithmetic number, because the mean of its divisors is an integer number (45043834965).

Almost surely, 2^90087669929 is an apocalyptic number.

It is an amenable number.

90087669929 is a deficient number, since it is larger than the sum of its proper divisors (1).

90087669929 is an equidigital number, since it uses as much as digits as its factorization.

90087669929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26453952, while the sum is 65.

The spelling of 90087669929 in words is "ninety billion, eighty-seven million, six hundred sixty-nine thousand, nine hundred twenty-nine".