51164693 has 2 divisors, whose sum is σ = 51164694. Its totient is φ = 51164692.

The previous prime is 51164653. The next prime is 51164699. The reversal of 51164693 is 39646115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43335889 + 7828804 = 6583^2 + 2798^2 .

It is a cyclic number.

It is not a de Polignac number, because 51164693 - 2⁶ = 51164629 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51164699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25582346 + 25582347.

It is an arithmetic number, because the mean of its divisors is an integer number (25582347).

Almost surely, 2^51164693 is an apocalyptic number.

It is an amenable number.

51164693 is a deficient number, since it is larger than the sum of its proper divisors (1).

51164693 is an equidigital number, since it uses as much as digits as its factorization.

51164693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 51164693 is about 7152.9499508944. The cubic root of 51164693 is about 371.2417325945.

The spelling of 51164693 in words is "fifty-one million, one hundred sixty-four thousand, six hundred ninety-three".