74287109 has 4 divisors (see below), whose sum is σ = 80001516. Its totient is φ = 68572704.

The previous prime is 74287099. The next prime is 74287117. The reversal of 74287109 is 90178247.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22591009 + 51696100 = 4753^2 + 7190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74287109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74287139) 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, 2857184 + ... + 2857209.

It is an arithmetic number, because the mean of its divisors is an integer number (20000379).

Almost surely, 2^74287109 is an apocalyptic number.

It is an amenable number.

74287109 is a deficient number, since it is larger than the sum of its proper divisors (5714407).

74287109 is a wasteful number, since it uses less digits than its factorization.

74287109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5714406.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 74287109 is about 8618.9969834082. The cubic root of 74287109 is about 420.3759087294.

The spelling of 74287109 in words is "seventy-four million, two hundred eighty-seven thousand, one hundred nine".