74198643 has 16 divisors (see below), whose sum is σ = 101606400. Its totient is φ = 48134720.

The previous prime is 74198639. The next prime is 74198651. The reversal of 74198643 is 34689147.

It is a cyclic number.

It is not a de Polignac number, because 74198643 - 2² = 74198639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74198595 and 74198604.

It is not an unprimeable number, because it can be changed into a prime (74198603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88018 + ... + 88856.

It is an arithmetic number, because the mean of its divisors is an integer number (6350400).

Almost surely, 2^74198643 is an apocalyptic number.

74198643 is a deficient number, since it is larger than the sum of its proper divisors (27407757).

74198643 is a wasteful number, since it uses less digits than its factorization.

74198643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602.

The product of its digits is 145152, while the sum is 42.

The square root of 74198643 is about 8613.8634189311. The cubic root of 74198643 is about 420.2089719720.

The spelling of 74198643 in words is "seventy-four million, one hundred ninety-eight thousand, six hundred forty-three".