51394289 has 2 divisors, whose sum is σ = 51394290. Its totient is φ = 51394288.

The previous prime is 51394283. The next prime is 51394307. The reversal of 51394289 is 98249315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27384289 + 24010000 = 5233^2 + 4900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51394289 is a prime.

It is not a weakly prime, because it can be changed into another prime (51394283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25697144 + 25697145.

It is an arithmetic number, because the mean of its divisors is an integer number (25697145).

Almost surely, 2^51394289 is an apocalyptic number.

It is an amenable number.

51394289 is a deficient number, since it is larger than the sum of its proper divisors (1).

51394289 is an equidigital number, since it uses as much as digits as its factorization.

51394289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 41.

The square root of 51394289 is about 7168.9810294072. The cubic root of 51394289 is about 371.7962063507.

The spelling of 51394289 in words is "fifty-one million, three hundred ninety-four thousand, two hundred eighty-nine".