51347909 has 8 divisors (see below), whose sum is σ = 52684128. Its totient is φ = 50027760.

The previous prime is 51347887. The next prime is 51347917. The reversal of 51347909 is 90974315.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51347909 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 (51347969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2594 + ... + 10460.

It is an arithmetic number, because the mean of its divisors is an integer number (6585516).

Almost surely, 2^51347909 is an apocalyptic number.

It is an amenable number.

51347909 is a deficient number, since it is larger than the sum of its proper divisors (1336219).

51347909 is a wasteful number, since it uses less digits than its factorization.

51347909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8035.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 51347909 is about 7165.7455299501. The cubic root of 51347909 is about 371.6843320669.

The spelling of 51347909 in words is "fifty-one million, three hundred forty-seven thousand, nine hundred nine".