43715989 has 2 divisors, whose sum is σ = 43715990. Its totient is φ = 43715988.

The previous prime is 43715951. The next prime is 43716011. The reversal of 43715989 is 98951734.

It is a happy number.

43715989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32547025 + 11168964 = 5705^2 + 3342^2 .

It is a cyclic number.

It is not a de Polignac number, because 43715989 - 2¹¹ = 43713941 is a prime.

It is a super-2 number, since 2×43715989² = 3822175388496242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43715929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21857994 + 21857995.

It is an arithmetic number, because the mean of its divisors is an integer number (21857995).

Almost surely, 2^43715989 is an apocalyptic number.

It is an amenable number.

43715989 is a deficient number, since it is larger than the sum of its proper divisors (1).

43715989 is an equidigital number, since it uses as much as digits as its factorization.

43715989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The square root of 43715989 is about 6611.8067878606. The cubic root of 43715989 is about 352.2736041026.

The spelling of 43715989 in words is "forty-three million, seven hundred fifteen thousand, nine hundred eighty-nine".