43020739 has 2 divisors, whose sum is σ = 43020740. Its totient is φ = 43020738.

The previous prime is 43020721. The next prime is 43020743. The reversal of 43020739 is 93702034.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43020739 - 2⁷ = 43020611 is a prime.

It is a super-2 number, since 2×43020739² = 3701567968212242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43020709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21510369 + 21510370.

It is an arithmetic number, because the mean of its divisors is an integer number (21510370).

Almost surely, 2^43020739 is an apocalyptic number.

43020739 is a deficient number, since it is larger than the sum of its proper divisors (1).

43020739 is an equidigital number, since it uses as much as digits as its factorization.

43020739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 43020739 is about 6559.0196676028. The cubic root of 43020739 is about 350.3961202206.

The spelling of 43020739 in words is "forty-three million, twenty thousand, seven hundred thirty-nine".