51660929 has 4 divisors (see below), whose sum is σ = 51676884. Its totient is φ = 51644976.

The previous prime is 51660923. The next prime is 51660937. The reversal of 51660929 is 92906615.

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 5107600 + 46553329 = 2260^2 + 6823^2 .

It is a cyclic number.

It is not a de Polignac number, because 51660929 - 2⁴ = 51660913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51660892 and 51660901.

It is not an unprimeable number, because it can be changed into a prime (51660923) 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, 1202 + ... + 10235.

It is an arithmetic number, because the mean of its divisors is an integer number (12919221).

Almost surely, 2^51660929 is an apocalyptic number.

It is an amenable number.

51660929 is a deficient number, since it is larger than the sum of its proper divisors (15955).

51660929 is a wasteful number, since it uses less digits than its factorization.

51660929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15954.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 51660929 is about 7187.5537563207. The cubic root of 51660929 is about 372.4380726745.

The spelling of 51660929 in words is "fifty-one million, six hundred sixty thousand, nine hundred twenty-nine".