399340123031 has 2 divisors, whose sum is σ = 399340123032. Its totient is φ = 399340123030.

The previous prime is 399340123027. The next prime is 399340123073. The reversal of 399340123031 is 130321043993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 399340123031 - 2² = 399340123027 is a prime.

It is a super-2 number, since 2×399340123031² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399340129031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199670061515 + 199670061516.

It is an arithmetic number, because the mean of its divisors is an integer number (199670061516).

Almost surely, 2^399340123031 is an apocalyptic number.

399340123031 is a deficient number, since it is larger than the sum of its proper divisors (1).

399340123031 is an equidigital number, since it uses as much as digits as its factorization.

399340123031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 38.

The spelling of 399340123031 in words is "three hundred ninety-nine billion, three hundred forty million, one hundred twenty-three thousand, thirty-one".