399049191243 has 12 divisors (see below), whose sum is σ = 576445240800. Its totient is φ = 266013938736.

The previous prime is 399049191239. The next prime is 399049191253. The reversal of 399049191243 is 342191940993.

399049191243 is a `hidden beast` number, since 399 + 0 + 4 + 9 + 1 + 9 + 1 + 243 = 666.

It is not a de Polignac number, because 399049191243 - 2² = 399049191239 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 399049191243.

It is not an unprimeable number, because it can be changed into a prime (399049191253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1436643 + ... + 1691756.

It is an arithmetic number, because the mean of its divisors is an integer number (48037103400).

Almost surely, 2^399049191243 is an apocalyptic number.

399049191243 is a deficient number, since it is larger than the sum of its proper divisors (177396049557).

399049191243 is a wasteful number, since it uses less digits than its factorization.

399049191243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3142578 (or 3142575 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 54.

The spelling of 399049191243 in words is "three hundred ninety-nine billion, forty-nine million, one hundred ninety-one thousand, two hundred forty-three".