399672460879 has 2 divisors, whose sum is σ = 399672460880. Its totient is φ = 399672460878.

The previous prime is 399672460829. The next prime is 399672460897. The reversal of 399672460879 is 978064276993.

Together with next prime (399672460897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399672460879 - 2¹⁷ = 399672329807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399672460829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199836230439 + 199836230440.

It is an arithmetic number, because the mean of its divisors is an integer number (199836230440).

Almost surely, 2^399672460879 is an apocalyptic number.

399672460879 is a deficient number, since it is larger than the sum of its proper divisors (1).

399672460879 is an equidigital number, since it uses as much as digits as its factorization.

399672460879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 246903552, while the sum is 70.

The spelling of 399672460879 in words is "three hundred ninety-nine billion, six hundred seventy-two million, four hundred sixty thousand, eight hundred seventy-nine".