72287641 has 2 divisors, whose sum is σ = 72287642. Its totient is φ = 72287640.

The previous prime is 72287627. The next prime is 72287651. The reversal of 72287641 is 14678227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72182016 + 105625 = 8496^2 + 325^2 .

It is an emirp because it is prime and its reverse (14678227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72287641 - 2⁹ = 72287129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72287641.

It is not a weakly prime, because it can be changed into another prime (72287651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36143820 + 36143821.

It is an arithmetic number, because the mean of its divisors is an integer number (36143821).

Almost surely, 2^72287641 is an apocalyptic number.

It is an amenable number.

72287641 is a deficient number, since it is larger than the sum of its proper divisors (1).

72287641 is an equidigital number, since it uses as much as digits as its factorization.

72287641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 37.

The square root of 72287641 is about 8502.2138881588. The cubic root of 72287641 is about 416.5700260849.

The spelling of 72287641 in words is "seventy-two million, two hundred eighty-seven thousand, six hundred forty-one".