74641643 has 2 divisors, whose sum is σ = 74641644. Its totient is φ = 74641642.

The previous prime is 74641639. The next prime is 74641681. The reversal of 74641643 is 34614647.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74641643 - 2² = 74641639 is a prime.

It is not a weakly prime, because it can be changed into another prime (74641603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37320821 + 37320822.

It is an arithmetic number, because the mean of its divisors is an integer number (37320822).

Almost surely, 2^74641643 is an apocalyptic number.

74641643 is a deficient number, since it is larger than the sum of its proper divisors (1).

74641643 is an equidigital number, since it uses as much as digits as its factorization.

74641643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 35.

The square root of 74641643 is about 8639.5395131917. The cubic root of 74641643 is about 421.0435933742.

The spelling of 74641643 in words is "seventy-four million, six hundred forty-one thousand, six hundred forty-three".