43390079 has 4 divisors (see below), whose sum is σ = 43774176. Its totient is φ = 43005984.

The previous prime is 43390073. The next prime is 43390097. The reversal of 43390079 is 97009334.

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 43390079 - 2¹² = 43385983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43390073) 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, 191879 + ... + 192104.

It is an arithmetic number, because the mean of its divisors is an integer number (10943544).

Almost surely, 2^43390079 is an apocalyptic number.

43390079 is a deficient number, since it is larger than the sum of its proper divisors (384097).

43390079 is a wasteful number, since it uses less digits than its factorization.

43390079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384096.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 43390079 is about 6587.1146187083. The cubic root of 43390079 is about 351.3960000612.

The spelling of 43390079 in words is "forty-three million, three hundred ninety thousand, seventy-nine".