51413689 has 2 divisors, whose sum is σ = 51413690. Its totient is φ = 51413688.

The previous prime is 51413653. The next prime is 51413699. The reversal of 51413689 is 98631415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30437289 + 20976400 = 5517^2 + 4580^2 .

It is a cyclic number.

It is not a de Polignac number, because 51413689 - 2⁷ = 51413561 is a prime.

It is not a weakly prime, because it can be changed into another prime (51413699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25706844 + 25706845.

It is an arithmetic number, because the mean of its divisors is an integer number (25706845).

Almost surely, 2^51413689 is an apocalyptic number.

It is an amenable number.

51413689 is a deficient number, since it is larger than the sum of its proper divisors (1).

51413689 is an equidigital number, since it uses as much as digits as its factorization.

51413689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 37.

The square root of 51413689 is about 7170.3339531712. Note that the first 3 decimals coincide. The cubic root of 51413689 is about 371.8429815806.

The spelling of 51413689 in words is "fifty-one million, four hundred thirteen thousand, six hundred eighty-nine".