51986593 has 4 divisors (see below), whose sum is σ = 52034580. Its totient is φ = 51938608.

The previous prime is 51986581. The next prime is 51986609. The reversal of 51986593 is 39568915.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39568915 = 5 ⋅7913783.

It can be written as a sum of positive squares in 2 ways, for example, as 1192464 + 50794129 = 1092^2 + 7127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51986593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51986513) 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, 22330 + ... + 24547.

It is an arithmetic number, because the mean of its divisors is an integer number (13008645).

Almost surely, 2^51986593 is an apocalyptic number.

It is an amenable number.

51986593 is a deficient number, since it is larger than the sum of its proper divisors (47987).

51986593 is a wasteful number, since it uses less digits than its factorization.

51986593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47986.

The product of its digits is 291600, while the sum is 46.

The square root of 51986593 is about 7210.1728828094. The cubic root of 51986593 is about 373.2190348622.

The spelling of 51986593 in words is "fifty-one million, nine hundred eighty-six thousand, five hundred ninety-three".