43979563 has 2 divisors, whose sum is σ = 43979564. Its totient is φ = 43979562.

The previous prime is 43979557. The next prime is 43979599. The reversal of 43979563 is 36597934.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43979563 is a prime.

It is not a weakly prime, because it can be changed into another prime (43979543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21989781 + 21989782.

It is an arithmetic number, because the mean of its divisors is an integer number (21989782).

Almost surely, 2^43979563 is an apocalyptic number.

43979563 is a deficient number, since it is larger than the sum of its proper divisors (1).

43979563 is an equidigital number, since it uses as much as digits as its factorization.

43979563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360, while the sum is 46.

The square root of 43979563 is about 6631.7089049505. The cubic root of 43979563 is about 352.9801661823.

The spelling of 43979563 in words is "forty-three million, nine hundred seventy-nine thousand, five hundred sixty-three".