51984709 has 8 divisors (see below), whose sum is σ = 60248448. Its totient is φ = 43930320.

The previous prime is 51984707. The next prime is 51984731. The reversal of 51984709 is 90748915.

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

It is not a de Polignac number, because 51984709 - 2¹ = 51984707 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 (51984701) 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, 51802 + ... + 52795.

It is an arithmetic number, because the mean of its divisors is an integer number (7531056).

Almost surely, 2^51984709 is an apocalyptic number.

It is an amenable number.

51984709 is a deficient number, since it is larger than the sum of its proper divisors (8263739).

51984709 is a wasteful number, since it uses less digits than its factorization.

51984709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104675.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 51984709 is about 7210.0422328860. The cubic root of 51984709 is about 373.2145263078.

The spelling of 51984709 in words is "fifty-one million, nine hundred eighty-four thousand, seven hundred nine".