39434909 has 2 divisors, whose sum is σ = 39434910. Its totient is φ = 39434908.

The previous prime is 39434893. The next prime is 39434911. The reversal of 39434909 is 90943493.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22829284 + 16605625 = 4778^2 + 4075^2 .

It is a cyclic number.

It is not a de Polignac number, because 39434909 - 2⁴ = 39434893 is a prime.

It is a super-2 number, since 2×39434909² = 3110224095676562, which contains 22 as substring.

Together with 39434911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39434939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19717454 + 19717455.

It is an arithmetic number, because the mean of its divisors is an integer number (19717455).

Almost surely, 2^39434909 is an apocalyptic number.

It is an amenable number.

39434909 is a deficient number, since it is larger than the sum of its proper divisors (1).

39434909 is an equidigital number, since it uses as much as digits as its factorization.

39434909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 39434909 is about 6279.7220479891. The cubic root of 39434909 is about 340.3770586209.

The spelling of 39434909 in words is "thirty-nine million, four hundred thirty-four thousand, nine hundred nine".