394941569 has 16 divisors (see below), whose sum is σ = 458524800. Its totient is φ = 336188160.

The previous prime is 394941539. The next prime is 394941623. The reversal of 394941569 is 965149493.

It is a de Polignac number, because none of the positive numbers 2^k-394941569 is a prime.

It is a super-2 number, since 2×394941569² = 311957685848363522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394941509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31907 + ... + 42519.

It is an arithmetic number, because the mean of its divisors is an integer number (28657800).

Almost surely, 2^394941569 is an apocalyptic number.

It is an amenable number.

394941569 is a deficient number, since it is larger than the sum of its proper divisors (63583231).

394941569 is a wasteful number, since it uses less digits than its factorization.

394941569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10840.

The product of its digits is 1049760, while the sum is 50.

The square root of 394941569 is about 19873.1368686476. The cubic root of 394941569 is about 733.6872112756.

The spelling of 394941569 in words is "three hundred ninety-four million, nine hundred forty-one thousand, five hundred sixty-nine".