90413987687 has 2 divisors, whose sum is σ = 90413987688. Its totient is φ = 90413987686.

The previous prime is 90413987669. The next prime is 90413987707. The reversal of 90413987687 is 78678931409.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90413987687 - 2⁸ = 90413987431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90413987627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45206993843 + 45206993844.

It is an arithmetic number, because the mean of its divisors is an integer number (45206993844).

Almost surely, 2^90413987687 is an apocalyptic number.

90413987687 is a deficient number, since it is larger than the sum of its proper divisors (1).

90413987687 is an equidigital number, since it uses as much as digits as its factorization.

90413987687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18289152, while the sum is 62.

The spelling of 90413987687 in words is "ninety billion, four hundred thirteen million, nine hundred eighty-seven thousand, six hundred eighty-seven".