43149983 has 2 divisors, whose sum is σ = 43149984. Its totient is φ = 43149982.

The previous prime is 43149979. The next prime is 43149989. The reversal of 43149983 is 38994134.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43149983 - 2² = 43149979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43149983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43149989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21574991 + 21574992.

It is an arithmetic number, because the mean of its divisors is an integer number (21574992).

Almost surely, 2^43149983 is an apocalyptic number.

43149983 is a deficient number, since it is larger than the sum of its proper divisors (1).

43149983 is an equidigital number, since it uses as much as digits as its factorization.

43149983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 41.

The square root of 43149983 is about 6568.8646659830. The cubic root of 43149983 is about 350.7466590721.

The spelling of 43149983 in words is "forty-three million, one hundred forty-nine thousand, nine hundred eighty-three".