51694847 has 2 divisors, whose sum is σ = 51694848. Its totient is φ = 51694846.

The previous prime is 51694837. The next prime is 51694859. The reversal of 51694847 is 74849615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51694847 - 2¹⁰ = 51693823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51694798 and 51694807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51694817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25847423 + 25847424.

It is an arithmetic number, because the mean of its divisors is an integer number (25847424).

Almost surely, 2^51694847 is an apocalyptic number.

51694847 is a deficient number, since it is larger than the sum of its proper divisors (1).

51694847 is an equidigital number, since it uses as much as digits as its factorization.

51694847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 51694847 is about 7189.9128645624. The cubic root of 51694847 is about 372.5195629562.

The spelling of 51694847 in words is "fifty-one million, six hundred ninety-four thousand, eight hundred forty-seven".