86612217 has 4 divisors (see below), whose sum is σ = 115482960. Its totient is φ = 57741476.

The previous prime is 86612209. The next prime is 86612221. The reversal of 86612217 is 71221668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86612217 - 2³ = 86612209 is a prime.

It is a super-2 number, since 2×86612217² = 15003352267310178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86612287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14435367 + ... + 14435372.

It is an arithmetic number, because the mean of its divisors is an integer number (28870740).

Almost surely, 2^86612217 is an apocalyptic number.

It is an amenable number.

86612217 is a deficient number, since it is larger than the sum of its proper divisors (28870743).

86612217 is a wasteful number, since it uses less digits than its factorization.

86612217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28870742.

The product of its digits is 8064, while the sum is 33.

The square root of 86612217 is about 9306.5684868269. The cubic root of 86612217 is about 442.4454348754.

It can be divided in two parts, 8661 and 2217, that added together give a triangular number (10878 = T₁₄₇).

The spelling of 86612217 in words is "eighty-six million, six hundred twelve thousand, two hundred seventeen".