399177073 has 2 divisors, whose sum is σ = 399177074. Its totient is φ = 399177072.

The previous prime is 399177011. The next prime is 399177113. The reversal of 399177073 is 370771993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 293334129 + 105842944 = 17127^2 + 10288^2 .

It is a cyclic number.

It is not a de Polignac number, because 399177073 - 2¹³ = 399168881 is a prime.

It is not a weakly prime, because it can be changed into another prime (399172073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199588536 + 199588537.

It is an arithmetic number, because the mean of its divisors is an integer number (199588537).

Almost surely, 2^399177073 is an apocalyptic number.

It is an amenable number.

399177073 is a deficient number, since it is larger than the sum of its proper divisors (1).

399177073 is an equidigital number, since it uses as much as digits as its factorization.

399177073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250047, while the sum is 46.

The square root of 399177073 is about 19979.4162327131. The cubic root of 399177073 is about 736.3006713252.

The spelling of 399177073 in words is "three hundred ninety-nine million, one hundred seventy-seven thousand, seventy-three".