43113979 has 2 divisors, whose sum is σ = 43113980. Its totient is φ = 43113978.

The previous prime is 43113953. The next prime is 43114051. The reversal of 43113979 is 97931134.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43113979 is a prime.

It is not a weakly prime, because it can be changed into another prime (43113949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21556989 + 21556990.

It is an arithmetic number, because the mean of its divisors is an integer number (21556990).

Almost surely, 2^43113979 is an apocalyptic number.

43113979 is a deficient number, since it is larger than the sum of its proper divisors (1).

43113979 is an equidigital number, since it uses as much as digits as its factorization.

43113979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 37.

The square root of 43113979 is about 6566.1235900644. The cubic root of 43113979 is about 350.6490785264.

The spelling of 43113979 in words is "forty-three million, one hundred thirteen thousand, nine hundred seventy-nine".