87201019 has 2 divisors, whose sum is σ = 87201020. Its totient is φ = 87201018.

The previous prime is 87201017. The next prime is 87201031. The reversal of 87201019 is 91010278.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87201019 - 2¹ = 87201017 is a prime.

It is a super-2 number, since 2×87201019² = 15208035429276722, which contains 22 as substring.

Together with 87201017, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87201017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43600509 + 43600510.

It is an arithmetic number, because the mean of its divisors is an integer number (43600510).

Almost surely, 2^87201019 is an apocalyptic number.

87201019 is a deficient number, since it is larger than the sum of its proper divisors (1).

87201019 is an equidigital number, since it uses as much as digits as its factorization.

87201019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 87201019 is about 9338.1485852389. The cubic root of 87201019 is about 443.4457735164.

It can be divided in two parts, 8 and 7201019, that added together give a palindrome (7201027).

The spelling of 87201019 in words is "eighty-seven million, two hundred one thousand, nineteen".