87415191 has 6 divisors (see below), whose sum is σ = 126266400. Its totient is φ = 58276788.

The previous prime is 87415189. The next prime is 87415247. The reversal of 87415191 is 19151478.

It is not a de Polignac number, because 87415191 - 2¹ = 87415189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87415291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4856391 + ... + 4856408.

It is an arithmetic number, because the mean of its divisors is an integer number (21044400).

Almost surely, 2^87415191 is an apocalyptic number.

87415191 is a deficient number, since it is larger than the sum of its proper divisors (38851209).

87415191 is a wasteful number, since it uses less digits than its factorization.

87415191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9712805 (or 9712802 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 87415191 is about 9349.6091362153. The cubic root of 87415191 is about 443.8085216477.

The spelling of 87415191 in words is "eighty-seven million, four hundred fifteen thousand, one hundred ninety-one".