51942679 has 4 divisors (see below), whose sum is σ = 52339320. Its totient is φ = 51546040.

The previous prime is 51942673. The next prime is 51942689. The reversal of 51942679 is 97624915.

It is a happy number.

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 51942679 - 2⁵ = 51942647 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 (51942673) 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, 198124 + ... + 198385.

It is an arithmetic number, because the mean of its divisors is an integer number (13084830).

Almost surely, 2^51942679 is an apocalyptic number.

51942679 is a deficient number, since it is larger than the sum of its proper divisors (396641).

51942679 is a wasteful number, since it uses less digits than its factorization.

51942679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396640.

The product of its digits is 136080, while the sum is 43.

The square root of 51942679 is about 7207.1269587818. The cubic root of 51942679 is about 373.1139170055.

The spelling of 51942679 in words is "fifty-one million, nine hundred forty-two thousand, six hundred seventy-nine".