51868673 has 4 divisors (see below), whose sum is σ = 53541888. Its totient is φ = 50195460.

The previous prime is 51868669. The next prime is 51868699. The reversal of 51868673 is 37686815.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51868673 - 2² = 51868669 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51868603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836561 + ... + 836622.

It is an arithmetic number, because the mean of its divisors is an integer number (13385472).

Almost surely, 2^51868673 is an apocalyptic number.

It is an amenable number.

51868673 is a deficient number, since it is larger than the sum of its proper divisors (1673215).

51868673 is a wasteful number, since it uses less digits than its factorization.

51868673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673214.

The product of its digits is 241920, while the sum is 44.

The square root of 51868673 is about 7201.9909052983. The cubic root of 51868673 is about 372.9366331656.

The spelling of 51868673 in words is "fifty-one million, eight hundred sixty-eight thousand, six hundred seventy-three".