380459921 has 4 divisors (see below), whose sum is σ = 380544000. Its totient is φ = 380375844.

The previous prime is 380459909. The next prime is 380459927. The reversal of 380459921 is 129954083.

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, and also an emirpimes, since its reverse is a distinct semiprime: 129954083 = 7 ⋅18564869.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-380459921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (380459927) 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, 34841 + ... + 44438.

It is an arithmetic number, because the mean of its divisors is an integer number (95136000).

Almost surely, 2^380459921 is an apocalyptic number.

It is an amenable number.

380459921 is a deficient number, since it is larger than the sum of its proper divisors (84079).

380459921 is an equidigital number, since it uses as much as digits as its factorization.

380459921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84078.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 380459921 is about 19505.3818470698. The cubic root of 380459921 is about 724.6077440536.

The spelling of 380459921 in words is "three hundred eighty million, four hundred fifty-nine thousand, nine hundred twenty-one".