43946972891 has 2 divisors, whose sum is σ = 43946972892. Its totient is φ = 43946972890.

The previous prime is 43946972831. The next prime is 43946972899. The reversal of 43946972891 is 19827964934.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43946972891 - 2³⁰ = 42873231067 is a prime.

It is not a weakly prime, because it can be changed into another prime (43946972899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21973486445 + 21973486446.

It is an arithmetic number, because the mean of its divisors is an integer number (21973486446).

Almost surely, 2^43946972891 is an apocalyptic number.

43946972891 is a deficient number, since it is larger than the sum of its proper divisors (1).

43946972891 is an equidigital number, since it uses as much as digits as its factorization.

43946972891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23514624, while the sum is 62.

The spelling of 43946972891 in words is "forty-three billion, nine hundred forty-six million, nine hundred seventy-two thousand, eight hundred ninety-one".