399140700407 has 2 divisors, whose sum is σ = 399140700408. Its totient is φ = 399140700406.

The previous prime is 399140700347. The next prime is 399140700433. The reversal of 399140700407 is 704007041993.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399140700407 - 2¹⁰ = 399140699383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399140702407) 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, 199570350203 + 199570350204.

It is an arithmetic number, because the mean of its divisors is an integer number (199570350204).

Almost surely, 2^399140700407 is an apocalyptic number.

399140700407 is a deficient number, since it is larger than the sum of its proper divisors (1).

399140700407 is an equidigital number, since it uses as much as digits as its factorization.

399140700407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 44.

The spelling of 399140700407 in words is "three hundred ninety-nine billion, one hundred forty million, seven hundred thousand, four hundred seven".