90877000261 has 2 divisors, whose sum is σ = 90877000262. Its totient is φ = 90877000260.

The previous prime is 90877000141. The next prime is 90877000303. The reversal of 90877000261 is 16200077809.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53779929025 + 37097071236 = 231905^2 + 192606^2 .

It is a cyclic number.

It is not a de Polignac number, because 90877000261 - 2¹⁷ = 90876869189 is a prime.

It is a congruent number.

It is a weakly prime.

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, 45438500130 + 45438500131.

It is an arithmetic number, because the mean of its divisors is an integer number (45438500131).

Almost surely, 2^90877000261 is an apocalyptic number.

It is an amenable number.

90877000261 is a deficient number, since it is larger than the sum of its proper divisors (1).

90877000261 is an equidigital number, since it uses as much as digits as its factorization.

90877000261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 40.

The spelling of 90877000261 in words is "ninety billion, eight hundred seventy-seven million, two hundred sixty-one", and thus it is an aban number.