394120699623 has 32 divisors (see below), whose sum is σ = 702415065600. Its totient is φ = 213358572288.

The previous prime is 394120699619. The next prime is 394120699627. The reversal of 394120699623 is 326996021493.

394120699623 is a `hidden beast` number, since 3 + 9 + 4 + 1 + 2 + 0 + 6 + 9 + 9 + 623 = 666.

It is an interprime number because it is at equal distance from previous prime (394120699619) and next prime (394120699627).

It is not a de Polignac number, because 394120699623 - 2² = 394120699619 is a prime.

It is a super-2 number, since 2×394120699623² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 394120699623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394120699627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54872586 + ... + 54879767.

It is an arithmetic number, because the mean of its divisors is an integer number (21950470800).

Almost surely, 2^394120699623 is an apocalyptic number.

394120699623 is a deficient number, since it is larger than the sum of its proper divisors (308294365977).

394120699623 is a wasteful number, since it uses less digits than its factorization.

394120699623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109752388 (or 109752382 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 54.

The spelling of 394120699623 in words is "three hundred ninety-four billion, one hundred twenty million, six hundred ninety-nine thousand, six hundred twenty-three".