86617809 has 16 divisors (see below), whose sum is σ = 132748800. Its totient is φ = 55753488.

The previous prime is 86617807. The next prime is 86617819. The reversal of 86617809 is 90871668.

It is a happy number.

It is not a de Polignac number, because 86617809 - 2¹ = 86617807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86617807) 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, 54529 + ... + 56094.

It is an arithmetic number, because the mean of its divisors is an integer number (8296800).

Almost surely, 2^86617809 is an apocalyptic number.

It is an amenable number.

86617809 is a deficient number, since it is larger than the sum of its proper divisors (46130991).

86617809 is a wasteful number, since it uses less digits than its factorization.

86617809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110661 (or 110655 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 86617809 is about 9306.8689149466. The cubic root of 86617809 is about 442.4549566331.

The spelling of 86617809 in words is "eighty-six million, six hundred seventeen thousand, eight hundred nine".