74393663 has 4 divisors (see below), whose sum is σ = 75052128. Its totient is φ = 73735200.

The previous prime is 74393611. The next prime is 74393681. The reversal of 74393663 is 36639347.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36639347 = 509 ⋅71983.

It is a cyclic number.

It is not a de Polignac number, because 74393663 - 2²² = 70199359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74393663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74390663) 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, 329063 + ... + 329288.

It is an arithmetic number, because the mean of its divisors is an integer number (18763032).

Almost surely, 2^74393663 is an apocalyptic number.

74393663 is a deficient number, since it is larger than the sum of its proper divisors (658465).

74393663 is a wasteful number, since it uses less digits than its factorization.

74393663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658464.

The product of its digits is 244944, while the sum is 41.

The square root of 74393663 is about 8625.1761141440. The cubic root of 74393663 is about 420.5768019755.

The spelling of 74393663 in words is "seventy-four million, three hundred ninety-three thousand, six hundred sixty-three".