43398139 has 4 divisors (see below), whose sum is σ = 43413840. Its totient is φ = 43382440.

The previous prime is 43398133. The next prime is 43398143. The reversal of 43398139 is 93189334.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43398139 - 2⁵ = 43398107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43398133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2479 + ... + 9640.

It is an arithmetic number, because the mean of its divisors is an integer number (10853460).

Almost surely, 2^43398139 is an apocalyptic number.

43398139 is a deficient number, since it is larger than the sum of its proper divisors (15701).

43398139 is a wasteful number, since it uses less digits than its factorization.

43398139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15700.

The product of its digits is 69984, while the sum is 40.

The square root of 43398139 is about 6587.7263907968. The cubic root of 43398139 is about 351.4177567735.

The spelling of 43398139 in words is "forty-three million, three hundred ninety-eight thousand, one hundred thirty-nine".