377981 has 2 divisors, whose sum is σ = 377982. Its totient is φ = 377980.

The previous prime is 377963. The next prime is 377999. The reversal of 377981 is 189773.

It is a balanced prime because it is at equal distance from previous prime (377963) and next prime (377999).

It can be written as a sum of positive squares in only one way, i.e., 241081 + 136900 = 491^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 377981 - 2¹⁸ = 115837 is a prime.

It is a super-2 number, since 2×377981² = 285739272722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (377911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 188990 + 188991.

It is an arithmetic number, because the mean of its divisors is an integer number (188991).

2³⁷⁷⁹⁸¹ is an apocalyptic number.

It is an amenable number.

377981 is a deficient number, since it is larger than the sum of its proper divisors (1).

377981 is an equidigital number, since it uses as much as digits as its factorization.

377981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 35.

The square root of 377981 is about 614.8015940122. The cubic root of 377981 is about 72.3030564578.

The spelling of 377981 in words is "three hundred seventy-seven thousand, nine hundred eighty-one".