87851747 has 2 divisors, whose sum is σ = 87851748. Its totient is φ = 87851746.

The previous prime is 87851707. The next prime is 87851783. The reversal of 87851747 is 74715878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87851747 - 2⁶ = 87851683 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87851707) 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, 43925873 + 43925874.

It is an arithmetic number, because the mean of its divisors is an integer number (43925874).

Almost surely, 2^87851747 is an apocalyptic number.

87851747 is a deficient number, since it is larger than the sum of its proper divisors (1).

87851747 is an equidigital number, since it uses as much as digits as its factorization.

87851747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 439040, while the sum is 47.

The square root of 87851747 is about 9372.9262773160. The cubic root of 87851747 is about 444.5460961076.

It can be divided in two parts, 878 and 51747, that added together give a palindrome (52625).

The spelling of 87851747 in words is "eighty-seven million, eight hundred fifty-one thousand, seven hundred forty-seven".