380121631 has 4 divisors (see below), whose sum is σ = 380398264. Its totient is φ = 379845000.

The previous prime is 380121629. The next prime is 380121653. The reversal of 380121631 is 136121083.

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 380121631 - 2¹ = 380121629 is a prime.

It is a super-2 number, since 2×380121631² = 288984908708200322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 380121596 and 380121605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380121661) 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, 136245 + ... + 139006.

It is an arithmetic number, because the mean of its divisors is an integer number (95099566).

Almost surely, 2^380121631 is an apocalyptic number.

380121631 is a deficient number, since it is larger than the sum of its proper divisors (276633).

380121631 is a wasteful number, since it uses less digits than its factorization.

380121631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276632.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 380121631 is about 19496.7082093363. The cubic root of 380121631 is about 724.3929161320.

The spelling of 380121631 in words is "three hundred eighty million, one hundred twenty-one thousand, six hundred thirty-one".