51767993 has 2 divisors, whose sum is σ = 51767994. Its totient is φ = 51767992.

The previous prime is 51767983. The next prime is 51768011. The reversal of 51767993 is 39976715.

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., 39601849 + 12166144 = 6293^2 + 3488^2 .

It is a cyclic number.

It is not a de Polignac number, because 51767993 - 2⁴ = 51767977 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51767983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25883996 + 25883997.

It is an arithmetic number, because the mean of its divisors is an integer number (25883997).

Almost surely, 2^51767993 is an apocalyptic number.

It is an amenable number.

51767993 is a deficient number, since it is larger than the sum of its proper divisors (1).

51767993 is an equidigital number, since it uses as much as digits as its factorization.

51767993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 357210, while the sum is 47.

The square root of 51767993 is about 7194.9977762332. The cubic root of 51767993 is about 372.6951799077.

The spelling of 51767993 in words is "fifty-one million, seven hundred sixty-seven thousand, nine hundred ninety-three".