51079609 has 9 divisors (see below), whose sum is σ = 59477391. Its totient is φ = 43739640.

The previous prime is 51079559. The next prime is 51079621. The reversal of 51079609 is 90697015.

The square root of 51079609 is 7147.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 29735209 + 21344400 = 5453^2 + 4620^2 .

It is not a de Polignac number, because 51079609 - 2⁹ = 51079097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51079649) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 49519 + ... + 50539.

It is an arithmetic number, because the mean of its divisors is an integer number (6608599).

Almost surely, 2^51079609 is an apocalyptic number.

51079609 is the 7147-th square number.

51079609 is the 3574-th centered octagonal number.

It is an amenable number.

51079609 is a deficient number, since it is larger than the sum of its proper divisors (8397782).

51079609 is an frugal number, since it uses more digits than its factorization.

51079609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056 (or 1028 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 37.

The cubic root of 51079609 is about 371.0358337288.

The spelling of 51079609 in words is "fifty-one million, seventy-nine thousand, six hundred nine".