170203870087 has 2 divisors, whose sum is σ = 170203870088. Its totient is φ = 170203870086.

The previous prime is 170203870073. The next prime is 170203870127. The reversal of 170203870087 is 780078302071.

It is a weak prime.

It is an emirp because it is prime and its reverse (780078302071) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170203870087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170203870007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85101935043 + 85101935044.

It is an arithmetic number, because the mean of its divisors is an integer number (85101935044).

Almost surely, 2^170203870087 is an apocalyptic number.

170203870087 is a deficient number, since it is larger than the sum of its proper divisors (1).

170203870087 is an equidigital number, since it uses as much as digits as its factorization.

170203870087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131712, while the sum is 43.

The spelling of 170203870087 in words is "one hundred seventy billion, two hundred three million, eight hundred seventy thousand, eighty-seven".