51986377 has 2 divisors, whose sum is σ = 51986378. Its totient is φ = 51986376.

The previous prime is 51986353. The next prime is 51986381. The reversal of 51986377 is 77368915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51494976 + 491401 = 7176^2 + 701^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51986377 is a prime.

It is a super-2 number, since 2×51986377² = 5405166787172258, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51986317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25993188 + 25993189.

It is an arithmetic number, because the mean of its divisors is an integer number (25993189).

Almost surely, 2^51986377 is an apocalyptic number.

It is an amenable number.

51986377 is a deficient number, since it is larger than the sum of its proper divisors (1).

51986377 is an equidigital number, since it uses as much as digits as its factorization.

51986377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 46.

The square root of 51986377 is about 7210.1579039574. The cubic root of 51986377 is about 373.2185179634.

The spelling of 51986377 in words is "fifty-one million, nine hundred eighty-six thousand, three hundred seventy-seven".