394731765099 has 12 divisors (see below), whose sum is σ = 651620691696. Its totient is φ = 225561008592.

The previous prime is 394731765089. The next prime is 394731765101. The reversal of 394731765099 is 990567137493.

394731765099 is a `hidden beast` number, since 3 + 9 + 473 + 1 + 76 + 5 + 0 + 99 = 666.

It is not a de Polignac number, because 394731765099 - 2⁵ = 394731765067 is a prime.

It is a super-2 number, since 2×394731765099² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 6265583573 = 394731765099 / (3 + 9 + 4 + 7 + 3 + 1 + 7 + 6 + 5 + 0 + 9 + 9).

It is not an unprimeable number, because it can be changed into a prime (394731765079) 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, 3132791724 + ... + 3132791849.

It is an arithmetic number, because the mean of its divisors is an integer number (54301724308).

Almost surely, 2^394731765099 is an apocalyptic number.

394731765099 is a deficient number, since it is larger than the sum of its proper divisors (256888926597).

394731765099 is a wasteful number, since it uses less digits than its factorization.

394731765099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6265583586 (or 6265583583 counting only the distinct ones).

The product of its (nonzero) digits is 38578680, while the sum is 63.

The spelling of 394731765099 in words is "three hundred ninety-four billion, seven hundred thirty-one million, seven hundred sixty-five thousand, ninety-nine".