43349939 has 2 divisors, whose sum is σ = 43349940. Its totient is φ = 43349938.

The previous prime is 43349921. The next prime is 43349941. The reversal of 43349939 is 93994334.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43349939 - 2²⁴ = 26572723 is a prime.

It is a super-2 number, since 2×43349939² = 3758434422607442, which contains 22 as substring.

Together with 43349941, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43349939.

It is not a weakly prime, because it can be changed into another prime (43349909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21674969 + 21674970.

It is an arithmetic number, because the mean of its divisors is an integer number (21674970).

Almost surely, 2^43349939 is an apocalyptic number.

43349939 is a deficient number, since it is larger than the sum of its proper divisors (1).

43349939 is an equidigital number, since it uses as much as digits as its factorization.

43349939 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 43349939 is about 6584.0670561591. The cubic root of 43349939 is about 351.2876082543.

The spelling of 43349939 in words is "forty-three million, three hundred forty-nine thousand, nine hundred thirty-nine".