51796809 has 9 divisors (see below), whose sum is σ = 74848813. Its totient is φ = 34516812.

The previous prime is 51796799. The next prime is 51796819. The reversal of 51796809 is 90869715.

The square root of 51796809 is 7197.

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

51796809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51796799) and next prime (51796819).

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 51796809 - 2⁵ = 51796777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51796819) 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 8 ways as a sum of consecutive naturals, for example, 20392 + ... + 22790.

Almost surely, 2^51796809 is an apocalyptic number.

51796809 is the 7197-th square number.

51796809 is the 3599-th centered octagonal number.

It is an amenable number.

51796809 is a deficient number, since it is larger than the sum of its proper divisors (23052004).

51796809 is an frugal number, since it uses more digits than its factorization.

51796809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4804 (or 2402 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The cubic root of 51796809 is about 372.7643191036.

The spelling of 51796809 in words is "fifty-one million, seven hundred ninety-six thousand, eight hundred nine".