43381879 has 2 divisors, whose sum is σ = 43381880. Its totient is φ = 43381878.

The previous prime is 43381867. The next prime is 43381907. The reversal of 43381879 is 97818334.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43381879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43381379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21690939 + 21690940.

It is an arithmetic number, because the mean of its divisors is an integer number (21690940).

Almost surely, 2^43381879 is an apocalyptic number.

43381879 is a deficient number, since it is larger than the sum of its proper divisors (1).

43381879 is an equidigital number, since it uses as much as digits as its factorization.

43381879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 43.

The square root of 43381879 is about 6586.4921619934. The cubic root of 43381879 is about 351.3738626755.

The spelling of 43381879 in words is "forty-three million, three hundred eighty-one thousand, eight hundred seventy-nine".