377479681 has 2 divisors, whose sum is σ = 377479682. Its totient is φ = 377479680.

The previous prime is 377479639. The next prime is 377479691. The reversal of 377479681 is 186974773.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 369408400 + 8071281 = 19220^2 + 2841^2 .

It is an emirp because it is prime and its reverse (186974773) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 377479681 - 2²¹ = 375382529 is a prime.

It is a super-2 number, since 2×377479681² = 284981819135723522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (377479691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 188739840 + 188739841.

It is an arithmetic number, because the mean of its divisors is an integer number (188739841).

Almost surely, 2^377479681 is an apocalyptic number.

It is an amenable number.

377479681 is a deficient number, since it is larger than the sum of its proper divisors (1).

377479681 is an equidigital number, since it uses as much as digits as its factorization.

377479681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 52.

The square root of 377479681 is about 19428.8363264504. The cubic root of 377479681 is about 722.7107695563.

The spelling of 377479681 in words is "three hundred seventy-seven million, four hundred seventy-nine thousand, six hundred eighty-one".