51739897 has 8 divisors (see below), whose sum is σ = 57026592. Its totient is φ = 46550400.

The previous prime is 51739861. The next prime is 51739913. The reversal of 51739897 is 79893715.

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 51739897 - 2¹¹ = 51737849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51739897.

It is not an unprimeable number, because it can be changed into a prime (51739817) 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, 23179 + ... + 25312.

It is an arithmetic number, because the mean of its divisors is an integer number (7128324).

Almost surely, 2^51739897 is an apocalyptic number.

It is an amenable number.

51739897 is a deficient number, since it is larger than the sum of its proper divisors (5286695).

51739897 is a wasteful number, since it uses less digits than its factorization.

51739897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48599.

The product of its digits is 476280, while the sum is 49.

The square root of 51739897 is about 7193.0450436515. The cubic root of 51739897 is about 372.6277435241.

The spelling of 51739897 in words is "fifty-one million, seven hundred thirty-nine thousand, eight hundred ninety-seven".