74965643 has 2 divisors, whose sum is σ = 74965644. Its totient is φ = 74965642.

The previous prime is 74965637. The next prime is 74965661. The reversal of 74965643 is 34656947.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74965643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74965594 and 74965603.

It is not a weakly prime, because it can be changed into another prime (74965603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37482821 + 37482822.

It is an arithmetic number, because the mean of its divisors is an integer number (37482822).

Almost surely, 2^74965643 is an apocalyptic number.

74965643 is a deficient number, since it is larger than the sum of its proper divisors (1).

74965643 is an equidigital number, since it uses as much as digits as its factorization.

74965643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 44.

The square root of 74965643 is about 8658.2702083037. The cubic root of 74965643 is about 421.6519276685.

The spelling of 74965643 in words is "seventy-four million, nine hundred sixty-five thousand, six hundred forty-three".