394731 has 12 divisors (see below), whose sum is σ = 580320. Its totient is φ = 258480.

The previous prime is 394729. The next prime is 394733. The reversal of 394731 is 137493.

It is an interprime number because it is at equal distance from previous prime (394729) and next prime (394733).

It is not a de Polignac number, because 394731 - 2¹ = 394729 is a prime.

It is a super-2 number, since 2×394731² = 311625124722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

394731 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 394695 and 394704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394733) 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, 190 + ... + 908.

It is an arithmetic number, because the mean of its divisors is an integer number (48360).

2³⁹⁴⁷³¹ is an apocalyptic number.

394731 is a deficient number, since it is larger than the sum of its proper divisors (185589).

394731 is a wasteful number, since it uses less digits than its factorization.

394731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786 (or 783 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 394731 is about 628.2762131420. The cubic root of 394731 is about 73.3556795995.

The spelling of 394731 in words is "three hundred ninety-four thousand, seven hundred thirty-one".