51868877 has 2 divisors, whose sum is σ = 51868878. Its totient is φ = 51868876.

The previous prime is 51868867. The next prime is 51868937. The reversal of 51868877 is 77886815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42784681 + 9084196 = 6541^2 + 3014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51868877 is a prime.

It is a super-2 number, since 2×51868877² = 5380760802482258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51868807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25934438 + 25934439.

It is an arithmetic number, because the mean of its divisors is an integer number (25934439).

Almost surely, 2^51868877 is an apocalyptic number.

It is an amenable number.

51868877 is a deficient number, since it is larger than the sum of its proper divisors (1).

51868877 is an equidigital number, since it uses as much as digits as its factorization.

51868877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 752640, while the sum is 50.

The square root of 51868877 is about 7202.0050680349. The cubic root of 51868877 is about 372.9371220861.

The spelling of 51868877 in words is "fifty-one million, eight hundred sixty-eight thousand, eight hundred seventy-seven".