51494393 has 2 divisors, whose sum is σ = 51494394. Its totient is φ = 51494392.

The previous prime is 51494381. The next prime is 51494413. The reversal of 51494393 is 39349415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50310649 + 1183744 = 7093^2 + 1088^2 .

It is a cyclic number.

It is not a de Polignac number, because 51494393 - 2⁶ = 51494329 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51494363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25747196 + 25747197.

It is an arithmetic number, because the mean of its divisors is an integer number (25747197).

Almost surely, 2^51494393 is an apocalyptic number.

It is an amenable number.

51494393 is a deficient number, since it is larger than the sum of its proper divisors (1).

51494393 is an equidigital number, since it uses as much as digits as its factorization.

51494393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 38.

The square root of 51494393 is about 7175.9593783689. The cubic root of 51494393 is about 372.0374403485.

The spelling of 51494393 in words is "fifty-one million, four hundred ninety-four thousand, three hundred ninety-three".