51769189 has 2 divisors, whose sum is σ = 51769190. Its totient is φ = 51769188.

The previous prime is 51769171. The next prime is 51769217. The reversal of 51769189 is 98196715.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41796225 + 9972964 = 6465^2 + 3158^2 .

It is a cyclic number.

It is not a de Polignac number, because 51769189 - 2¹⁷ = 51638117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51761189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25884594 + 25884595.

It is an arithmetic number, because the mean of its divisors is an integer number (25884595).

Almost surely, 2^51769189 is an apocalyptic number.

It is an amenable number.

51769189 is a deficient number, since it is larger than the sum of its proper divisors (1).

51769189 is an equidigital number, since it uses as much as digits as its factorization.

51769189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 46.

The square root of 51769189 is about 7195.0808890519. The cubic root of 51769189 is about 372.6980500209.

It can be divided in two parts, 5176 and 9189, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 51769189 in words is "fifty-one million, seven hundred sixty-nine thousand, one hundred eighty-nine".