90951093887 has 4 divisors (see below), whose sum is σ = 91834114320. Its totient is φ = 90068073456.

The previous prime is 90951093869. The next prime is 90951093889. The reversal of 90951093887 is 78839015909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78839015909 = 157 ⋅502159337.

It is a cyclic number.

It is not a de Polignac number, because 90951093887 - 2⁸ = 90951093631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90951093889) 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, 441510062 + ... + 441510267.

It is an arithmetic number, because the mean of its divisors is an integer number (22958528580).

Almost surely, 2^90951093887 is an apocalyptic number.

90951093887 is a deficient number, since it is larger than the sum of its proper divisors (883020433).

90951093887 is a wasteful number, since it uses less digits than its factorization.

90951093887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883020432.

The product of its (nonzero) digits is 4898880, while the sum is 59.

The spelling of 90951093887 in words is "ninety billion, nine hundred fifty-one million, ninety-three thousand, eight hundred eighty-seven".