43394139 has 12 divisors (see below), whose sum is σ = 62998000. Its totient is φ = 28782864.

The previous prime is 43394137. The next prime is 43394161. The reversal of 43394139 is 93149334.

43394139 is a `hidden beast` number, since 433 + 94 + 139 = 666.

It is not a de Polignac number, because 43394139 - 2¹ = 43394137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43394137) 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, 10324 + ... + 13905.

Almost surely, 2^43394139 is an apocalyptic number.

43394139 is a deficient number, since it is larger than the sum of its proper divisors (19603861).

43394139 is a wasteful number, since it uses less digits than its factorization.

43394139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24434 (or 24431 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 43394139 is about 6587.4227889213. The cubic root of 43394139 is about 351.4069597344.

The spelling of 43394139 in words is "forty-three million, three hundred ninety-four thousand, one hundred thirty-nine".