51039787 has 2 divisors, whose sum is σ = 51039788. Its totient is φ = 51039786.

The previous prime is 51039773. The next prime is 51039799. The reversal of 51039787 is 78793015.

51039787 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51039787 - 2¹¹ = 51037739 is a prime.

It is not a weakly prime, because it can be changed into another prime (51039587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25519893 + 25519894.

It is an arithmetic number, because the mean of its divisors is an integer number (25519894).

Almost surely, 2^51039787 is an apocalyptic number.

51039787 is a deficient number, since it is larger than the sum of its proper divisors (1).

51039787 is an equidigital number, since it uses as much as digits as its factorization.

51039787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 51039787 is about 7144.2135326430. The cubic root of 51039787 is about 370.9393880003.

The spelling of 51039787 in words is "fifty-one million, thirty-nine thousand, seven hundred eighty-seven".