90087669961 has 2 divisors, whose sum is σ = 90087669962. Its totient is φ = 90087669960.

The previous prime is 90087669937. The next prime is 90087669977. The reversal of 90087669961 is 16996678009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89090310400 + 997359561 = 298480^2 + 31581^2 .

It is a cyclic number.

It is not a de Polignac number, because 90087669961 - 2⁵ = 90087669929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90087669961.

It is not a weakly prime, because it can be changed into another prime (90087669911) 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, 45043834980 + 45043834981.

It is an arithmetic number, because the mean of its divisors is an integer number (45043834981).

Almost surely, 2^90087669961 is an apocalyptic number.

It is an amenable number.

90087669961 is a deficient number, since it is larger than the sum of its proper divisors (1).

90087669961 is an equidigital number, since it uses as much as digits as its factorization.

90087669961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8817984, while the sum is 61.

The spelling of 90087669961 in words is "ninety billion, eighty-seven million, six hundred sixty-nine thousand, nine hundred sixty-one".