51927929 has 4 divisors (see below), whose sum is σ = 51997284. Its totient is φ = 51858576.

The previous prime is 51927923. The next prime is 51927943. The reversal of 51927929 is 92972915.

It is a happy number.

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 17682025 + 34245904 = 4205^2 + 5852^2 .

It is a cyclic number.

It is not a de Polignac number, because 51927929 - 2⁴ = 51927913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51927929.

It is not an unprimeable number, because it can be changed into a prime (51927923) 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, 33542 + ... + 35055.

It is an arithmetic number, because the mean of its divisors is an integer number (12999321).

Almost surely, 2^51927929 is an apocalyptic number.

It is an amenable number.

51927929 is a deficient number, since it is larger than the sum of its proper divisors (69355).

51927929 is an equidigital number, since it uses as much as digits as its factorization.

51927929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69354.

The product of its digits is 102060, while the sum is 44.

The square root of 51927929 is about 7206.1035934824. The cubic root of 51927929 is about 373.0785963315.

The spelling of 51927929 in words is "fifty-one million, nine hundred twenty-seven thousand, nine hundred twenty-nine".