399786471053 has 2 divisors, whose sum is σ = 399786471054. Its totient is φ = 399786471052.

The previous prime is 399786471031. The next prime is 399786471059. The reversal of 399786471053 is 350174687993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 399420208009 + 366263044 = 631997^2 + 19138^2 .

It is a cyclic number.

It is not a de Polignac number, because 399786471053 - 2³⁴ = 382606601869 is a prime.

It is a super-2 number, since 2×399786471053² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399786471059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199893235526 + 199893235527.

It is an arithmetic number, because the mean of its divisors is an integer number (199893235527).

Almost surely, 2^399786471053 is an apocalyptic number.

It is an amenable number.

399786471053 is a deficient number, since it is larger than the sum of its proper divisors (1).

399786471053 is an equidigital number, since it uses as much as digits as its factorization.

399786471053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34292160, while the sum is 62.

The spelling of 399786471053 in words is "three hundred ninety-nine billion, seven hundred eighty-six million, four hundred seventy-one thousand, fifty-three".