43712689 has 2 divisors, whose sum is σ = 43712690. Its totient is φ = 43712688.

The previous prime is 43712681. The next prime is 43712717. The reversal of 43712689 is 98621734.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43362225 + 350464 = 6585^2 + 592^2 .

It is a cyclic number.

It is not a de Polignac number, because 43712689 - 2³ = 43712681 is a prime.

It is a super-2 number, since 2×43712689² = 3821598359221442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43712681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21856344 + 21856345.

It is an arithmetic number, because the mean of its divisors is an integer number (21856345).

Almost surely, 2^43712689 is an apocalyptic number.

It is an amenable number.

43712689 is a deficient number, since it is larger than the sum of its proper divisors (1).

43712689 is an equidigital number, since it uses as much as digits as its factorization.

43712689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 43712689 is about 6611.5572295791. The cubic root of 43712689 is about 352.2647398238.

The spelling of 43712689 in words is "forty-three million, seven hundred twelve thousand, six hundred eighty-nine".