90090840767 has 2 divisors, whose sum is σ = 90090840768. Its totient is φ = 90090840766.

The previous prime is 90090840761. The next prime is 90090840779. The reversal of 90090840767 is 76704809009.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90090840767 - 2¹⁰ = 90090839743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90090840761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45045420383 + 45045420384.

It is an arithmetic number, because the mean of its divisors is an integer number (45045420384).

Almost surely, 2^90090840767 is an apocalyptic number.

90090840767 is a deficient number, since it is larger than the sum of its proper divisors (1).

90090840767 is an equidigital number, since it uses as much as digits as its factorization.

90090840767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 90090840767 in words is "ninety billion, ninety million, eight hundred forty thousand, seven hundred sixty-seven".