51672893 has 4 divisors (see below), whose sum is σ = 51697308. Its totient is φ = 51648480.

The previous prime is 51672889. The next prime is 51672899. The reversal of 51672893 is 39827615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43731769 + 7941124 = 6613^2 + 2818^2 .

It is a cyclic number.

It is not a de Polignac number, because 51672893 - 2² = 51672889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51672893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51672899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8696 + ... + 13377.

It is an arithmetic number, because the mean of its divisors is an integer number (12924327).

Almost surely, 2^51672893 is an apocalyptic number.

It is an amenable number.

51672893 is a deficient number, since it is larger than the sum of its proper divisors (24415).

51672893 is a wasteful number, since it uses less digits than its factorization.

51672893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24414.

The product of its digits is 90720, while the sum is 41.

The square root of 51672893 is about 7188.3859801766. The cubic root of 51672893 is about 372.4668210617.

The spelling of 51672893 in words is "fifty-one million, six hundred seventy-two thousand, eight hundred ninety-three".