921790675999 has 4 divisors (see below), whose sum is σ = 926940344760. Its totient is φ = 916641007240.

The previous prime is 921790675979. The next prime is 921790676077. The reversal of 921790675999 is 999576097129.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 921790675999 - 2²⁷ = 921656458271 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 (921790675979) 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, 2574834112 + ... + 2574834469.

It is an arithmetic number, because the mean of its divisors is an integer number (231735086190).

Almost surely, 2^921790675999 is an apocalyptic number.

921790675999 is a deficient number, since it is larger than the sum of its proper divisors (5149668761).

921790675999 is a wasteful number, since it uses less digits than its factorization.

921790675999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5149668760.

The product of its (nonzero) digits is 173604060, while the sum is 73.

The spelling of 921790675999 in words is "nine hundred twenty-one billion, seven hundred ninety million, six hundred seventy-five thousand, nine hundred ninety-nine".