74380643 has 4 divisors (see below), whose sum is σ = 77614608. Its totient is φ = 71146680.

The previous prime is 74380639. The next prime is 74380703. The reversal of 74380643 is 34608347.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34608347 = 653 ⋅52999.

It is a cyclic number.

It is not a de Polignac number, because 74380643 - 2² = 74380639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74380043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1616948 + ... + 1616993.

It is an arithmetic number, because the mean of its divisors is an integer number (19403652).

Almost surely, 2^74380643 is an apocalyptic number.

74380643 is a deficient number, since it is larger than the sum of its proper divisors (3233965).

74380643 is a wasteful number, since it uses less digits than its factorization.

74380643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233964.

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

The square root of 74380643 is about 8624.4213139201. The cubic root of 74380643 is about 420.5522648074.

The spelling of 74380643 in words is "seventy-four million, three hundred eighty thousand, six hundred forty-three".