51769769 has 2 divisors, whose sum is σ = 51769770. Its totient is φ = 51769768.

The previous prime is 51769747. The next prime is 51769793. The reversal of 51769769 is 96796715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50694400 + 1075369 = 7120^2 + 1037^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51769769 is a prime.

It is a super-2 number, since 2×51769769² = 5360217964626722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51769799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25884884 + 25884885.

It is an arithmetic number, because the mean of its divisors is an integer number (25884885).

Almost surely, 2^51769769 is an apocalyptic number.

It is an amenable number.

51769769 is a deficient number, since it is larger than the sum of its proper divisors (1).

51769769 is an equidigital number, since it uses as much as digits as its factorization.

51769769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 714420, while the sum is 50.

The square root of 51769769 is about 7195.1211942538. The cubic root of 51769769 is about 372.6994418659.

The spelling of 51769769 in words is "fifty-one million, seven hundred sixty-nine thousand, seven hundred sixty-nine".