400000307939 has 2 divisors, whose sum is σ = 400000307940. Its totient is φ = 400000307938.

The previous prime is 400000307933. The next prime is 400000307963. The reversal of 400000307939 is 939703000004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400000307939 - 2⁸ = 400000307683 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400000307899 and 400000307908.

It is not a weakly prime, because it can be changed into another prime (400000307933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200000153969 + 200000153970.

It is an arithmetic number, because the mean of its divisors is an integer number (200000153970).

Almost surely, 2^400000307939 is an apocalyptic number.

400000307939 is a deficient number, since it is larger than the sum of its proper divisors (1).

400000307939 is an equidigital number, since it uses as much as digits as its factorization.

400000307939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 35.

The spelling of 400000307939 in words is "four hundred billion, three hundred seven thousand, nine hundred thirty-nine".