377199973921 has 2 divisors, whose sum is σ = 377199973922. Its totient is φ = 377199973920.

The previous prime is 377199973877. The next prime is 377199973949. The reversal of 377199973921 is 129379991773.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 360316869696 + 16883104225 = 600264^2 + 129935^2 .

It is an emirp because it is prime and its reverse (129379991773) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 377199973921 - 2³¹ = 375052490273 is a prime.

It is a super-2 number, since 2×377199973921² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (377199973961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 188599986960 + 188599986961.

It is an arithmetic number, because the mean of its divisors is an integer number (188599986961).

Almost surely, 2^377199973921 is an apocalyptic number.

It is an amenable number.

377199973921 is a deficient number, since it is larger than the sum of its proper divisors (1).

377199973921 is an equidigital number, since it uses as much as digits as its factorization.

377199973921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40507614, while the sum is 67.

The spelling of 377199973921 in words is "three hundred seventy-seven billion, one hundred ninety-nine million, nine hundred seventy-three thousand, nine hundred twenty-one".