90842657887 has 2 divisors, whose sum is σ = 90842657888. Its totient is φ = 90842657886.

The previous prime is 90842657879. The next prime is 90842657929. The reversal of 90842657887 is 78875624809.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90842657887 - 2³ = 90842657879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90846657887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45421328943 + 45421328944.

It is an arithmetic number, because the mean of its divisors is an integer number (45421328944).

Almost surely, 2^90842657887 is an apocalyptic number.

90842657887 is a deficient number, since it is larger than the sum of its proper divisors (1).

90842657887 is an equidigital number, since it uses as much as digits as its factorization.

90842657887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54190080, while the sum is 64.

The spelling of 90842657887 in words is "ninety billion, eight hundred forty-two million, six hundred fifty-seven thousand, eight hundred eighty-seven".