39434939 has 2 divisors, whose sum is σ = 39434940. Its totient is φ = 39434938.

The previous prime is 39434911. The next prime is 39434959. The reversal of 39434939 is 93943493.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39434939 is a prime.

It is a super-2 number, since 2×39434939² = 3110228827867442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39434939.

It is not a weakly prime, because it can be changed into another prime (39434909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19717469 + 19717470.

It is an arithmetic number, because the mean of its divisors is an integer number (19717470).

Almost surely, 2^39434939 is an apocalyptic number.

39434939 is a deficient number, since it is larger than the sum of its proper divisors (1).

39434939 is an equidigital number, since it uses as much as digits as its factorization.

39434939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314928, while the sum is 44.

The square root of 39434939 is about 6279.7244366294. The cubic root of 39434939 is about 340.3771449345.

The spelling of 39434939 in words is "thirty-nine million, four hundred thirty-four thousand, nine hundred thirty-nine".