51879847 has 2 divisors, whose sum is σ = 51879848. Its totient is φ = 51879846.

The previous prime is 51879781. The next prime is 51879857. The reversal of 51879847 is 74897815.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51879847 - 2¹⁹ = 51355559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51879847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51879857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25939923 + 25939924.

It is an arithmetic number, because the mean of its divisors is an integer number (25939924).

Almost surely, 2^51879847 is an apocalyptic number.

51879847 is a deficient number, since it is larger than the sum of its proper divisors (1).

51879847 is an equidigital number, since it uses as much as digits as its factorization.

51879847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 49.

The square root of 51879847 is about 7202.7666212366. The cubic root of 51879847 is about 372.9634116588.

The spelling of 51879847 in words is "fifty-one million, eight hundred seventy-nine thousand, eight hundred forty-seven".