51349847 has 2 divisors, whose sum is σ = 51349848. Its totient is φ = 51349846.

The previous prime is 51349829. The next prime is 51349849. The reversal of 51349847 is 74894315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51349847 - 2⁸ = 51349591 is a prime.

Together with 51349849, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51349849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25674923 + 25674924.

It is an arithmetic number, because the mean of its divisors is an integer number (25674924).

Almost surely, 2^51349847 is an apocalyptic number.

51349847 is a deficient number, since it is larger than the sum of its proper divisors (1).

51349847 is an equidigital number, since it uses as much as digits as its factorization.

51349847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 51349847 is about 7165.8807553573. The cubic root of 51349847 is about 371.6890081105.

The spelling of 51349847 in words is "fifty-one million, three hundred forty-nine thousand, eight hundred forty-seven".