399969250559 has 4 divisors (see below), whose sum is σ = 412871484480. Its totient is φ = 387067016640.

The previous prime is 399969250543. The next prime is 399969250579. The reversal of 399969250559 is 955052969993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 955052969993 = 43237 ⋅22088789.

It is a cyclic number.

It is not a de Polignac number, because 399969250559 - 2⁴ = 399969250543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 399969250492 and 399969250501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399969250579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6451116914 + ... + 6451116975.

It is an arithmetic number, because the mean of its divisors is an integer number (103217871120).

Almost surely, 2^399969250559 is an apocalyptic number.

399969250559 is a deficient number, since it is larger than the sum of its proper divisors (12902233921).

399969250559 is a wasteful number, since it uses less digits than its factorization.

399969250559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12902233920.

The product of its (nonzero) digits is 265720500, while the sum is 71.

The spelling of 399969250559 in words is "three hundred ninety-nine billion, nine hundred sixty-nine million, two hundred fifty thousand, five hundred fifty-nine".