380193921 has 12 divisors (see below), whose sum is σ = 549345940. Its totient is φ = 253380960.

The previous prime is 380193911. The next prime is 380193941. The reversal of 380193921 is 129391083.

380193921 is a `hidden beast` number, since 380 + 193 + 92 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 118919025 + 261274896 = 10905^2 + 16164^2 .

It is not a de Polignac number, because 380193921 - 2¹⁷ = 380062849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (380193911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38691 + ... + 47511.

Almost surely, 2^380193921 is an apocalyptic number.

It is an amenable number.

380193921 is a deficient number, since it is larger than the sum of its proper divisors (169152019).

380193921 is a wasteful number, since it uses less digits than its factorization.

380193921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13616 (or 13613 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 380193921 is about 19498.5620239032. The cubic root of 380193921 is about 724.4388339299.

The spelling of 380193921 in words is "three hundred eighty million, one hundred ninety-three thousand, nine hundred twenty-one".