74425643 has 8 divisors (see below), whose sum is σ = 78998400. Its totient is φ = 69874560.

The previous prime is 74425639. The next prime is 74425667. The reversal of 74425643 is 34652447.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74425643 - 2² = 74425639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74425613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1958 + ... + 12356.

It is an arithmetic number, because the mean of its divisors is an integer number (9874800).

Almost surely, 2^74425643 is an apocalyptic number.

74425643 is a deficient number, since it is larger than the sum of its proper divisors (4572757).

74425643 is a wasteful number, since it uses less digits than its factorization.

74425643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10837.

The product of its digits is 80640, while the sum is 35.

The square root of 74425643 is about 8627.0297901421. The cubic root of 74425643 is about 420.6370585384.

The spelling of 74425643 in words is "seventy-four million, four hundred twenty-five thousand, six hundred forty-three".