87191670103 has 16 divisors (see below), whose sum is σ = 90884021760. Its totient is φ = 83592529696.

The previous prime is 87191670091. The next prime is 87191670113. The reversal of 87191670103 is 30107619178.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87191670103 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87191670103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87191670113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 438726 + ... + 605692.

It is an arithmetic number, because the mean of its divisors is an integer number (5680251360).

Almost surely, 2^87191670103 is an apocalyptic number.

87191670103 is a deficient number, since it is larger than the sum of its proper divisors (3692351657).

87191670103 is a wasteful number, since it uses less digits than its factorization.

87191670103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167246.

The product of its (nonzero) digits is 63504, while the sum is 43.

The spelling of 87191670103 in words is "eighty-seven billion, one hundred ninety-one million, six hundred seventy thousand, one hundred three".