399343268029 has 2 divisors, whose sum is σ = 399343268030. Its totient is φ = 399343268028.

The previous prime is 399343268017. The next prime is 399343268081. The reversal of 399343268029 is 920862343993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 363033965529 + 36309302500 = 602523^2 + 190550^2 .

It is a cyclic number.

It is not a de Polignac number, because 399343268029 - 2⁵ = 399343267997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399343268629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199671634014 + 199671634015.

It is an arithmetic number, because the mean of its divisors is an integer number (199671634015).

Almost surely, 2^399343268029 is an apocalyptic number.

It is an amenable number.

399343268029 is a deficient number, since it is larger than the sum of its proper divisors (1).

399343268029 is an equidigital number, since it uses as much as digits as its factorization.

399343268029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15116544, while the sum is 58.

The spelling of 399343268029 in words is "three hundred ninety-nine billion, three hundred forty-three million, two hundred sixty-eight thousand, twenty-nine".