377397981 has 8 divisors (see below), whose sum is σ = 559108160. Its totient is φ = 251598636.

The previous prime is 377397973. The next prime is 377398019. The reversal of 377397981 is 189793773.

It is a happy number.

It is not a de Polignac number, because 377397981 - 2³ = 377397973 is a prime.

It is a super-2 number, since 2×377397981² = 284858472125752722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (377397901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6988825 + ... + 6988878.

It is an arithmetic number, because the mean of its divisors is an integer number (69888520).

Almost surely, 2^377397981 is an apocalyptic number.

It is an amenable number.

377397981 is a deficient number, since it is larger than the sum of its proper divisors (181710179).

377397981 is a wasteful number, since it uses less digits than its factorization.

377397981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13977712 (or 13977706 counting only the distinct ones).

The product of its digits is 2000376, while the sum is 54.

The square root of 377397981 is about 19426.7336678094. The cubic root of 377397981 is about 722.6586257075.

The spelling of 377397981 in words is "three hundred seventy-seven million, three hundred ninety-seven thousand, nine hundred eighty-one".