51289693 has 8 divisors (see below), whose sum is σ = 63125888. Its totient is φ = 40580784.

The previous prime is 51289681. The next prime is 51289699. The reversal of 51289693 is 39698215.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51289693 - 2²¹ = 49192541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51289699) 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, 281721 + ... + 281902.

It is an arithmetic number, because the mean of its divisors is an integer number (7890736).

Almost surely, 2^51289693 is an apocalyptic number.

It is an amenable number.

51289693 is a deficient number, since it is larger than the sum of its proper divisors (11836195).

51289693 is a wasteful number, since it uses less digits than its factorization.

51289693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563643.

The product of its digits is 116640, while the sum is 43.

The square root of 51289693 is about 7161.6822744380. The cubic root of 51289693 is about 371.5438125012.

The spelling of 51289693 in words is "fifty-one million, two hundred eighty-nine thousand, six hundred ninety-three".