74189407 has 4 divisors (see below), whose sum is σ = 74471760. Its totient is φ = 73907056.

The previous prime is 74189387. The next prime is 74189419. The reversal of 74189407 is 70498147.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74189407 is a prime.

It is a super-2 number, since 2×74189407² = 11008136222023298, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 74189407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74189497) 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 in 3 ways as a sum of consecutive naturals, for example, 140782 + ... + 141307.

It is an arithmetic number, because the mean of its divisors is an integer number (18617940).

Almost surely, 2^74189407 is an apocalyptic number.

74189407 is a deficient number, since it is larger than the sum of its proper divisors (282353).

74189407 is a wasteful number, since it uses less digits than its factorization.

74189407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282352.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 74189407 is about 8613.3272897296. The cubic root of 74189407 is about 420.1915358440.

The spelling of 74189407 in words is "seventy-four million, one hundred eighty-nine thousand, four hundred seven".