379999999999921 has 4 divisors (see below), whose sum is σ = 434285714285632. Its totient is φ = 325714285714212.

The previous prime is 379999999999903. The next prime is 379999999999933. The reversal of 379999999999921 is 129999999999973.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 379999999999921 - 2⁷ = 379999999999793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (379999999999951) 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, 27142857142845 + ... + 27142857142858.

It is an arithmetic number, because the mean of its divisors is an integer number (108571428571408).

Almost surely, 2^{379999999999921} is an apocalyptic number.

It is an amenable number.

379999999999921 is a deficient number, since it is larger than the sum of its proper divisors (54285714285711).

379999999999921 is an equidigital number, since it uses as much as digits as its factorization.

379999999999921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54285714285710.

The product of its digits is 1318004503578, while the sum is 112.

The spelling of 379999999999921 in words is "three hundred seventy-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred twenty-one".