51436789 has 2 divisors, whose sum is σ = 51436790. Its totient is φ = 51436788.

The previous prime is 51436739. The next prime is 51436793. The reversal of 51436789 is 98763415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51408900 + 27889 = 7170^2 + 167^2 .

It is a cyclic number.

It is not a de Polignac number, because 51436789 - 2⁷ = 51436661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51436709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25718394 + 25718395.

It is an arithmetic number, because the mean of its divisors is an integer number (25718395).

Almost surely, 2^51436789 is an apocalyptic number.

It is an amenable number.

51436789 is a deficient number, since it is larger than the sum of its proper divisors (1).

51436789 is an equidigital number, since it uses as much as digits as its factorization.

51436789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 51436789 is about 7171.9445759152. The cubic root of 51436789 is about 371.8986625152.

It can be divided in two parts, 51436 and 789, that added together give a palindrome (52225).

The spelling of 51436789 in words is "fifty-one million, four hundred thirty-six thousand, seven hundred eighty-nine".