43497913 has 2 divisors, whose sum is σ = 43497914. Its totient is φ = 43497912.

The previous prime is 43497877. The next prime is 43497919. The reversal of 43497913 is 31979434.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36385024 + 7112889 = 6032^2 + 2667^2 .

It is a cyclic number.

It is not a de Polignac number, because 43497913 - 2²⁵ = 9943481 is a prime.

It is not a weakly prime, because it can be changed into another prime (43497919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21748956 + 21748957.

It is an arithmetic number, because the mean of its divisors is an integer number (21748957).

Almost surely, 2^43497913 is an apocalyptic number.

It is an amenable number.

43497913 is a deficient number, since it is larger than the sum of its proper divisors (1).

43497913 is an equidigital number, since it uses as much as digits as its factorization.

43497913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 40.

The square root of 43497913 is about 6595.2947621770. The cubic root of 43497913 is about 351.6868583252.

The spelling of 43497913 in words is "forty-three million, four hundred ninety-seven thousand, nine hundred thirteen".