399337296247 has 4 divisors (see below), whose sum is σ = 422827725456. Its totient is φ = 375846867040.

The previous prime is 399337296229. The next prime is 399337296301. The reversal of 399337296247 is 742692733993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 399337296247 - 2¹⁹ = 399336771959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399337296647) 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, 11745214579 + ... + 11745214612.

It is an arithmetic number, because the mean of its divisors is an integer number (105706931364).

Almost surely, 2^399337296247 is an apocalyptic number.

399337296247 is a deficient number, since it is larger than the sum of its proper divisors (23490429209).

399337296247 is a wasteful number, since it uses less digits than its factorization.

399337296247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23490429208.

The product of its digits is 92588832, while the sum is 64.

The spelling of 399337296247 in words is "three hundred ninety-nine billion, three hundred thirty-seven million, two hundred ninety-six thousand, two hundred forty-seven".