394729929 has 24 divisors (see below), whose sum is σ = 645040032. Its totient is φ = 239228640.

The previous prime is 394729927. The next prime is 394729931. The reversal of 394729929 is 929927493.

It is an interprime number because it is at equal distance from previous prime (394729927) and next prime (394729931).

It is not a de Polignac number, because 394729929 - 2¹ = 394729927 is a prime.

It is not an unprimeable number, because it can be changed into a prime (394729927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71164 + ... + 76509.

It is an arithmetic number, because the mean of its divisors is an integer number (26876668).

Almost surely, 2^394729929 is an apocalyptic number.

It is an amenable number.

394729929 is a deficient number, since it is larger than the sum of its proper divisors (250310103).

394729929 is a wasteful number, since it uses less digits than its factorization.

394729929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147699 (or 147687 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 394729929 is about 19867.8113792134. The cubic root of 394729929 is about 733.5561325555.

The spelling of 394729929 in words is "three hundred ninety-four million, seven hundred twenty-nine thousand, nine hundred twenty-nine".