43278113 has 2 divisors, whose sum is σ = 43278114. Its totient is φ = 43278112.

The previous prime is 43278089. The next prime is 43278133. The reversal of 43278113 is 31187234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23493409 + 19784704 = 4847^2 + 4448^2 .

It is a cyclic number.

It is not a de Polignac number, because 43278113 - 2¹⁰ = 43277089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43278133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21639056 + 21639057.

It is an arithmetic number, because the mean of its divisors is an integer number (21639057).

Almost surely, 2^43278113 is an apocalyptic number.

It is an amenable number.

43278113 is a deficient number, since it is larger than the sum of its proper divisors (1).

43278113 is an equidigital number, since it uses as much as digits as its factorization.

43278113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 43278113 is about 6578.6102635739. The cubic root of 43278113 is about 351.0934862442.

The spelling of 43278113 in words is "forty-three million, two hundred seventy-eight thousand, one hundred thirteen".