399789390773 has 8 divisors (see below), whose sum is σ = 400489522776. Its totient is φ = 399089376000.

The previous prime is 399789390761. The next prime is 399789390839. The reversal of 399789390773 is 377093987993.

It can be written as a sum of positive squares in 4 ways, for example, as 152742617329 + 247046773444 = 390823^2 + 497038^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 399789390773 - 2²⁴ = 399772613557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 399789390773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399789390743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9434393 + ... + 9476673.

It is an arithmetic number, because the mean of its divisors is an integer number (50061190347).

Almost surely, 2^399789390773 is an apocalyptic number.

It is an amenable number.

399789390773 is a deficient number, since it is larger than the sum of its proper divisors (700132003).

399789390773 is a wasteful number, since it uses less digits than its factorization.

399789390773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58615.

The product of its (nonzero) digits is 486091368, while the sum is 74.

The spelling of 399789390773 in words is "three hundred ninety-nine billion, seven hundred eighty-nine million, three hundred ninety thousand, seven hundred seventy-three".