43712731 has 2 divisors, whose sum is σ = 43712732. Its totient is φ = 43712730.

The previous prime is 43712717. The next prime is 43712737. The reversal of 43712731 is 13721734.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43712731 - 2¹⁹ = 43188443 is a prime.

It is a super-2 number, since 2×43712731² = 3821605702956722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43712731.

It is not a weakly prime, because it can be changed into another prime (43712737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21856365 + 21856366.

It is an arithmetic number, because the mean of its divisors is an integer number (21856366).

Almost surely, 2^43712731 is an apocalyptic number.

43712731 is a deficient number, since it is larger than the sum of its proper divisors (1).

43712731 is an equidigital number, since it uses as much as digits as its factorization.

43712731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3528, while the sum is 28.

The square root of 43712731 is about 6611.5604058346. The cubic root of 43712731 is about 352.2648526447.

The spelling of 43712731 in words is "forty-three million, seven hundred twelve thousand, seven hundred thirty-one".