377872861 has 2 divisors, whose sum is σ = 377872862. Its totient is φ = 377872860.

The previous prime is 377872829. The next prime is 377872921. The reversal of 377872861 is 168278773.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 375003225 + 2869636 = 19365^2 + 1694^2 .

It is a cyclic number.

It is not a de Polignac number, because 377872861 - 2⁵ = 377872829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (377872801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 188936430 + 188936431.

It is an arithmetic number, because the mean of its divisors is an integer number (188936431).

Almost surely, 2^377872861 is an apocalyptic number.

It is an amenable number.

377872861 is a deficient number, since it is larger than the sum of its proper divisors (1).

377872861 is an equidigital number, since it uses as much as digits as its factorization.

377872861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 790272, while the sum is 49.

The square root of 377872861 is about 19438.9521579739. The cubic root of 377872861 is about 722.9616058561.

The spelling of 377872861 in words is "three hundred seventy-seven million, eight hundred seventy-two thousand, eight hundred sixty-one".