43139907 has 12 divisors (see below), whose sum is σ = 64462320. Its totient is φ = 27768048.

The previous prime is 43139867. The next prime is 43139917. The reversal of 43139907 is 70993134.

It is not a de Polignac number, because 43139907 - 2¹¹ = 43137859 is a prime.

It is a super-2 number, since 2×43139907² = 3722103151937298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43139917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82383 + ... + 82904.

It is an arithmetic number, because the mean of its divisors is an integer number (5371860).

Almost surely, 2^43139907 is an apocalyptic number.

43139907 is a deficient number, since it is larger than the sum of its proper divisors (21322413).

43139907 is a wasteful number, since it uses less digits than its factorization.

43139907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165322 (or 165319 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 43139907 is about 6568.0976697975. The cubic root of 43139907 is about 350.7193558673.

The spelling of 43139907 in words is "forty-three million, one hundred thirty-nine thousand, nine hundred seven".