71572109 has 8 divisors (see below), whose sum is σ = 82716480. Its totient is φ = 60657696.

The previous prime is 71572103. The next prime is 71572121. The reversal of 71572109 is 90127517.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71572109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71572103) 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, 56819 + ... + 58064.

It is an arithmetic number, because the mean of its divisors is an integer number (10339560).

Almost surely, 2^71572109 is an apocalyptic number.

It is an amenable number.

71572109 is a deficient number, since it is larger than the sum of its proper divisors (11144371).

71572109 is a wasteful number, since it uses less digits than its factorization.

71572109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114979.

The product of its (nonzero) digits is 4410, while the sum is 32.

The square root of 71572109 is about 8460.0300826888. The cubic root of 71572109 is about 415.1910070563.

The spelling of 71572109 in words is "seventy-one million, five hundred seventy-two thousand, one hundred nine".