87193000819 has 2 divisors, whose sum is σ = 87193000820. Its totient is φ = 87193000818.

The previous prime is 87193000751. The next prime is 87193000823. The reversal of 87193000819 is 91800039178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87193000819 - 2¹⁹ = 87192476531 is a prime.

It is a super-2 number, since 2×87193000819² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87193000849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43596500409 + 43596500410.

It is an arithmetic number, because the mean of its divisors is an integer number (43596500410).

Almost surely, 2^87193000819 is an apocalyptic number.

87193000819 is a deficient number, since it is larger than the sum of its proper divisors (1).

87193000819 is an equidigital number, since it uses as much as digits as its factorization.

87193000819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 46.

The spelling of 87193000819 in words is "eighty-seven billion, one hundred ninety-three million, eight hundred nineteen", and thus it is an aban number.