51376987 has 2 divisors, whose sum is σ = 51376988. Its totient is φ = 51376986.

The previous prime is 51376957. The next prime is 51377003. The reversal of 51376987 is 78967315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51376987 - 2¹⁹ = 50852699 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51376937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25688493 + 25688494.

It is an arithmetic number, because the mean of its divisors is an integer number (25688494).

Almost surely, 2^51376987 is an apocalyptic number.

51376987 is a deficient number, since it is larger than the sum of its proper divisors (1).

51376987 is an equidigital number, since it uses as much as digits as its factorization.

51376987 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 51376987 is about 7167.7742012427. The cubic root of 51376987 is about 371.7544796654.

The spelling of 51376987 in words is "fifty-one million, three hundred seventy-six thousand, nine hundred eighty-seven".