90502690867 has 4 divisors (see below), whose sum is σ = 92036634840. Its totient is φ = 88968746896.

The previous prime is 90502690843. The next prime is 90502690879. The reversal of 90502690867 is 76809620509.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76809620509 = 2689 ⋅28564381.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90502690867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90502693867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 766971898 + ... + 766972015.

It is an arithmetic number, because the mean of its divisors is an integer number (23009158710).

Almost surely, 2^90502690867 is an apocalyptic number.

90502690867 is a deficient number, since it is larger than the sum of its proper divisors (1533943973).

90502690867 is a wasteful number, since it uses less digits than its factorization.

90502690867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533943972.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 90502690867 in words is "ninety billion, five hundred two million, six hundred ninety thousand, eight hundred sixty-seven".