43020139 has 2 divisors, whose sum is σ = 43020140. Its totient is φ = 43020138.

The previous prime is 43020127. The next prime is 43020151. The reversal of 43020139 is 93102034.

It is a balanced prime because it is at equal distance from previous prime (43020127) and next prime (43020151).

It is a cyclic number.

It is not a de Polignac number, because 43020139 - 2²⁵ = 9465707 is a prime.

It is not a weakly prime, because it can be changed into another prime (43020739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21510069 + 21510070.

It is an arithmetic number, because the mean of its divisors is an integer number (21510070).

Almost surely, 2^43020139 is an apocalyptic number.

43020139 is a deficient number, since it is larger than the sum of its proper divisors (1).

43020139 is an equidigital number, since it uses as much as digits as its factorization.

43020139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 43020139 is about 6558.9739289008. The cubic root of 43020139 is about 350.3944912492.

The spelling of 43020139 in words is "forty-three million, twenty thousand, one hundred thirty-nine".