74940643 has 2 divisors, whose sum is σ = 74940644. Its totient is φ = 74940642.

The previous prime is 74940631. The next prime is 74940667. The reversal of 74940643 is 34604947.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74940643 is a prime.

It is not a weakly prime, because it can be changed into another prime (74940673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37470321 + 37470322.

It is an arithmetic number, because the mean of its divisors is an integer number (37470322).

Almost surely, 2^74940643 is an apocalyptic number.

74940643 is a deficient number, since it is larger than the sum of its proper divisors (1).

74940643 is an equidigital number, since it uses as much as digits as its factorization.

74940643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 74940643 is about 8656.8263815327. The cubic root of 74940643 is about 421.6050507714.

The spelling of 74940643 in words is "seventy-four million, nine hundred forty thousand, six hundred forty-three".