74562643 has 2 divisors, whose sum is σ = 74562644. Its totient is φ = 74562642.

The previous prime is 74562623. The next prime is 74562667. The reversal of 74562643 is 34626547.

It is a weak prime.

It is an emirp because it is prime and its reverse (34626547) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74562643 is a prime.

It is a super-2 number, since 2×74562643² = 11119175462290898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74562613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37281321 + 37281322.

It is an arithmetic number, because the mean of its divisors is an integer number (37281322).

Almost surely, 2^74562643 is an apocalyptic number.

74562643 is a deficient number, since it is larger than the sum of its proper divisors (1).

74562643 is an equidigital number, since it uses as much as digits as its factorization.

74562643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 37.

The square root of 74562643 is about 8634.9662998763. The cubic root of 74562643 is about 420.8949981025.

The spelling of 74562643 in words is "seventy-four million, five hundred sixty-two thousand, six hundred forty-three".