43057939 has 2 divisors, whose sum is σ = 43057940. Its totient is φ = 43057938.

The previous prime is 43057901. The next prime is 43057951. The reversal of 43057939 is 93975034.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43057939 is a prime.

It is a super-2 number, since 2×43057939² = 3707972221855442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43057979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21528969 + 21528970.

It is an arithmetic number, because the mean of its divisors is an integer number (21528970).

Almost surely, 2^43057939 is an apocalyptic number.

43057939 is a deficient number, since it is larger than the sum of its proper divisors (1).

43057939 is an equidigital number, since it uses as much as digits as its factorization.

43057939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 40.

The square root of 43057939 is about 6561.8548444780. The cubic root of 43057939 is about 350.4970868763.

The spelling of 43057939 in words is "forty-three million, fifty-seven thousand, nine hundred thirty-nine".