51999673 has 4 divisors (see below), whose sum is σ = 56726928. Its totient is φ = 47272420.

The previous prime is 51999667. The next prime is 51999683. The reversal of 51999673 is 37699915.

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 51999673 - 2⁵ = 51999641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51999613) 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, 2363611 + ... + 2363632.

It is an arithmetic number, because the mean of its divisors is an integer number (14181732).

Almost surely, 2^51999673 is an apocalyptic number.

It is an amenable number.

51999673 is a deficient number, since it is larger than the sum of its proper divisors (4727255).

51999673 is a wasteful number, since it uses less digits than its factorization.

51999673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4727254.

The product of its digits is 459270, while the sum is 49.

The square root of 51999673 is about 7211.0798775218. The cubic root of 51999673 is about 373.2503332883.

The spelling of 51999673 in words is "fifty-one million, nine hundred ninety-nine thousand, six hundred seventy-three".