43872071 has 2 divisors, whose sum is σ = 43872072. Its totient is φ = 43872070.

The previous prime is 43872067. The next prime is 43872079. The reversal of 43872071 is 17027834.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43872071 - 2² = 43872067 is a prime.

It is a super-2 number, since 2×43872071² = 3849517227658082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43872079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21936035 + 21936036.

It is an arithmetic number, because the mean of its divisors is an integer number (21936036).

Almost surely, 2^43872071 is an apocalyptic number.

43872071 is a deficient number, since it is larger than the sum of its proper divisors (1).

43872071 is an equidigital number, since it uses as much as digits as its factorization.

43872071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 43872071 is about 6623.5995500936. The cubic root of 43872071 is about 352.6923544828.

The spelling of 43872071 in words is "forty-three million, eight hundred seventy-two thousand, seventy-one".