43480991 has 2 divisors, whose sum is σ = 43480992. Its totient is φ = 43480990.

The previous prime is 43480973. The next prime is 43481023. The reversal of 43480991 is 19908434.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43480991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43480901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21740495 + 21740496.

It is an arithmetic number, because the mean of its divisors is an integer number (21740496).

Almost surely, 2^43480991 is an apocalyptic number.

43480991 is a deficient number, since it is larger than the sum of its proper divisors (1).

43480991 is an equidigital number, since it uses as much as digits as its factorization.

43480991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 43480991 is about 6594.0117530984. The cubic root of 43480991 is about 351.6412468118.

The spelling of 43480991 in words is "forty-three million, four hundred eighty thousand, nine hundred ninety-one".