43983091 has 2 divisors, whose sum is σ = 43983092. Its totient is φ = 43983090.

The previous prime is 43983089. The next prime is 43983101. The reversal of 43983091 is 19038934.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43983091 - 2¹ = 43983089 is a prime.

Together with 43983089, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 43983091.

It is not a weakly prime, because it can be changed into another prime (43983391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21991545 + 21991546.

It is an arithmetic number, because the mean of its divisors is an integer number (21991546).

Almost surely, 2^43983091 is an apocalyptic number.

43983091 is a deficient number, since it is larger than the sum of its proper divisors (1).

43983091 is an equidigital number, since it uses as much as digits as its factorization.

43983091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 43983091 is about 6631.9748944036. The cubic root of 43983091 is about 352.9896045111.

The spelling of 43983091 in words is "forty-three million, nine hundred eighty-three thousand, ninety-one".