399246290971 has 4 divisors (see below), whose sum is σ = 435541408344. Its totient is φ = 362951173600.

The previous prime is 399246290959. The next prime is 399246290999. The reversal of 399246290971 is 179092642993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179092642993 = 11 ⋅16281149363.

It is a cyclic number.

It is not a de Polignac number, because 399246290971 - 2¹³ = 399246282779 is a prime.

It is a super-2 number, since 2×399246290971² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399246290171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18147558670 + ... + 18147558691.

It is an arithmetic number, because the mean of its divisors is an integer number (108885352086).

Almost surely, 2^399246290971 is an apocalyptic number.

399246290971 is a deficient number, since it is larger than the sum of its proper divisors (36295117373).

399246290971 is a wasteful number, since it uses less digits than its factorization.

399246290971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36295117372.

The product of its (nonzero) digits is 13226976, while the sum is 61.

The spelling of 399246290971 in words is "three hundred ninety-nine billion, two hundred forty-six million, two hundred ninety thousand, nine hundred seventy-one".