91860921623 has 8 divisors (see below), whose sum is σ = 95056132080. Its totient is φ = 88667550720.

The previous prime is 91860921613. The next prime is 91860921637. The reversal of 91860921623 is 32612906819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91860921623 - 2²⁰ = 91859873047 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 (91860921613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357893 + ... + 558398.

It is an arithmetic number, because the mean of its divisors is an integer number (11882016510).

Almost surely, 2^91860921623 is an apocalyptic number.

91860921623 is a deficient number, since it is larger than the sum of its proper divisors (3195210457).

91860921623 is a wasteful number, since it uses less digits than its factorization.

91860921623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919777.

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 91860921623 in words is "ninety-one billion, eight hundred sixty million, nine hundred twenty-one thousand, six hundred twenty-three".