394172383 has 6 divisors (see below), whose sum is σ = 433263992. Its totient is φ = 358338420.

The previous prime is 394172381. The next prime is 394172399. The reversal of 394172383 is 383271493.

It is not a de Polignac number, because 394172383 - 2¹ = 394172381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394172381) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1628691 + ... + 1628932.

Almost surely, 2^394172383 is an apocalyptic number.

394172383 is a deficient number, since it is larger than the sum of its proper divisors (39091609).

394172383 is a wasteful number, since it uses less digits than its factorization.

394172383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257645 (or 3257634 counting only the distinct ones).

The product of its digits is 108864, while the sum is 40.

The square root of 394172383 is about 19853.7750314644. The cubic root of 394172383 is about 733.2105933467.

The spelling of 394172383 in words is "three hundred ninety-four million, one hundred seventy-two thousand, three hundred eighty-three".