87532019 has 2 divisors, whose sum is σ = 87532020. Its totient is φ = 87532018.

The previous prime is 87532013. The next prime is 87532051. The reversal of 87532019 is 91023578.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87532019 is a prime.

It is a super-2 number, since 2×87532019² = 15323708700432722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87532019.

It is not a weakly prime, because it can be changed into another prime (87532013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43766009 + 43766010.

It is an arithmetic number, because the mean of its divisors is an integer number (43766010).

Almost surely, 2^87532019 is an apocalyptic number.

87532019 is a deficient number, since it is larger than the sum of its proper divisors (1).

87532019 is an equidigital number, since it uses as much as digits as its factorization.

87532019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 87532019 is about 9355.8547979327. The cubic root of 87532019 is about 444.0061462640.

The spelling of 87532019 in words is "eighty-seven million, five hundred thirty-two thousand, nineteen".