51799789 has 4 divisors (see below), whose sum is σ = 51824124. Its totient is φ = 51775456.

The previous prime is 51799733. The next prime is 51799793. The reversal of 51799789 is 98799715.

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 16337764 + 35462025 = 4042^2 + 5955^2 .

It is a cyclic number.

It is not a de Polignac number, because 51799789 - 2⁷ = 51799661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51794789) 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, 8632 + ... + 13345.

It is an arithmetic number, because the mean of its divisors is an integer number (12956031).

Almost surely, 2^51799789 is an apocalyptic number.

It is an amenable number.

51799789 is a deficient number, since it is larger than the sum of its proper divisors (24335).

51799789 is a wasteful number, since it uses less digits than its factorization.

51799789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24334.

The product of its digits is 1428840, while the sum is 55.

The square root of 51799789 is about 7197.2070277296. The cubic root of 51799789 is about 372.7714676544.

The spelling of 51799789 in words is "fifty-one million, seven hundred ninety-nine thousand, seven hundred eighty-nine".