399451463 has 2 divisors, whose sum is σ = 399451464. Its totient is φ = 399451462.

The previous prime is 399451453. The next prime is 399451469. The reversal of 399451463 is 364154993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399451463 - 2⁴ = 399451447 is a prime.

It is a super-2 number, since 2×399451463² = 319122942585680738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399451469) 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, 199725731 + 199725732.

It is an arithmetic number, because the mean of its divisors is an integer number (199725732).

Almost surely, 2^399451463 is an apocalyptic number.

399451463 is a deficient number, since it is larger than the sum of its proper divisors (1).

399451463 is an equidigital number, since it uses as much as digits as its factorization.

399451463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 44.

The square root of 399451463 is about 19986.2818703230. The cubic root of 399451463 is about 736.4693410548.

The spelling of 399451463 in words is "three hundred ninety-nine million, four hundred fifty-one thousand, four hundred sixty-three".