72258643 has 2 divisors, whose sum is σ = 72258644. Its totient is φ = 72258642.

The previous prime is 72258631. The next prime is 72258647. The reversal of 72258643 is 34685227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72258643 - 2⁵ = 72258611 is a prime.

It is a super-2 number, since 2×72258643² = 10442622976402898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72258647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36129321 + 36129322.

It is an arithmetic number, because the mean of its divisors is an integer number (36129322).

Almost surely, 2^72258643 is an apocalyptic number.

72258643 is a deficient number, since it is larger than the sum of its proper divisors (1).

72258643 is an equidigital number, since it uses as much as digits as its factorization.

72258643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 37.

The square root of 72258643 is about 8500.5083965608. The cubic root of 72258643 is about 416.5143166393.

The spelling of 72258643 in words is "seventy-two million, two hundred fifty-eight thousand, six hundred forty-three".