399353505701 has 4 divisors (see below), whose sum is σ = 399355197900. Its totient is φ = 399351813504.

The previous prime is 399353505671. The next prime is 399353505703. The reversal of 399353505701 is 107505353993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 107505353993 = 32441 ⋅3313873.

It can be written as a sum of positive squares in 2 ways, for example, as 316366876225 + 82986629476 = 562465^2 + 288074^2 .

It is a cyclic number.

It is not a de Polignac number, because 399353505701 - 2⁶ = 399353505637 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 399353505701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399353505703) 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, 420866 + ... + 987843.

It is an arithmetic number, because the mean of its divisors is an integer number (99838799475).

Almost surely, 2^399353505701 is an apocalyptic number.

It is an amenable number.

399353505701 is a deficient number, since it is larger than the sum of its proper divisors (1692199).

399353505701 is a wasteful number, since it uses less digits than its factorization.

399353505701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692198.

The product of its (nonzero) digits is 1913625, while the sum is 50.

The spelling of 399353505701 in words is "three hundred ninety-nine billion, three hundred fifty-three million, five hundred five thousand, seven hundred one".