51943679 has 4 divisors (see below), whose sum is σ = 53210640. Its totient is φ = 50676720.

The previous prime is 51943673. The next prime is 51943681. The reversal of 51943679 is 97634915.

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

It is a cyclic number.

It is not a de Polignac number, because 51943679 - 2¹⁶ = 51878143 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 (51943673) 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, 633419 + ... + 633500.

It is an arithmetic number, because the mean of its divisors is an integer number (13302660).

Almost surely, 2^51943679 is an apocalyptic number.

51943679 is a deficient number, since it is larger than the sum of its proper divisors (1266961).

51943679 is a wasteful number, since it uses less digits than its factorization.

51943679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266960.

The product of its digits is 204120, while the sum is 44.

The square root of 51943679 is about 7207.1963342204. The cubic root of 51943679 is about 373.1163113854.

The spelling of 51943679 in words is "fifty-one million, nine hundred forty-three thousand, six hundred seventy-nine".