56071709 has 4 divisors (see below), whose sum is σ = 56186400. Its totient is φ = 55957020.

The previous prime is 56071667. The next prime is 56071733. The reversal of 56071709 is 90717065.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56071709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56071739) 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, 56609 + ... + 57590.

It is an arithmetic number, because the mean of its divisors is an integer number (14046600).

Almost surely, 2^56071709 is an apocalyptic number.

It is an amenable number.

56071709 is a deficient number, since it is larger than the sum of its proper divisors (114691).

56071709 is a wasteful number, since it uses less digits than its factorization.

56071709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114690.

The product of its (nonzero) digits is 13230, while the sum is 35.

The square root of 56071709 is about 7488.1044998050. The cubic root of 56071709 is about 382.7494697359.

The spelling of 56071709 in words is "fifty-six million, seventy-one thousand, seven hundred nine".