399180377 has 2 divisors, whose sum is σ = 399180378. Its totient is φ = 399180376.

The previous prime is 399180347. The next prime is 399180409. The reversal of 399180377 is 773081993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 282777856 + 116402521 = 16816^2 + 10789^2 .

It is a cyclic number.

It is not a de Polignac number, because 399180377 - 2⁸ = 399180121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (399180347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199590188 + 199590189.

It is an arithmetic number, because the mean of its divisors is an integer number (199590189).

Almost surely, 2^399180377 is an apocalyptic number.

It is an amenable number.

399180377 is a deficient number, since it is larger than the sum of its proper divisors (1).

399180377 is an equidigital number, since it uses as much as digits as its factorization.

399180377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 399180377 is about 19979.4989176406. The cubic root of 399180377 is about 736.3027027801.

The spelling of 399180377 in words is "three hundred ninety-nine million, one hundred eighty thousand, three hundred seventy-seven".