399052477 has 2 divisors, whose sum is σ = 399052478. Its totient is φ = 399052476.

The previous prime is 399052439. The next prime is 399052483. The reversal of 399052477 is 774250993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 278689636 + 120362841 = 16694^2 + 10971^2 .

It is a cyclic number.

It is not a de Polignac number, because 399052477 - 2⁷ = 399052349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399052417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199526238 + 199526239.

It is an arithmetic number, because the mean of its divisors is an integer number (199526239).

Almost surely, 2^399052477 is an apocalyptic number.

It is an amenable number.

399052477 is a deficient number, since it is larger than the sum of its proper divisors (1).

399052477 is an equidigital number, since it uses as much as digits as its factorization.

399052477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 476280, while the sum is 46.

The square root of 399052477 is about 19976.2978802380. The cubic root of 399052477 is about 736.2240556481.

The spelling of 399052477 in words is "three hundred ninety-nine million, fifty-two thousand, four hundred seventy-seven".