86818897 has 4 divisors (see below), whose sum is σ = 94711536. Its totient is φ = 78926260.

The previous prime is 86818891. The next prime is 86818903. The reversal of 86818897 is 79881868.

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 an interprime number because it is at equal distance from previous prime (86818891) and next prime (86818903).

It is a cyclic number.

It is not a de Polignac number, because 86818897 - 2⁷ = 86818769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86818891) 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, 3946303 + ... + 3946324.

It is an arithmetic number, because the mean of its divisors is an integer number (23677884).

Almost surely, 2^86818897 is an apocalyptic number.

It is an amenable number.

86818897 is a deficient number, since it is larger than the sum of its proper divisors (7892639).

86818897 is a wasteful number, since it uses less digits than its factorization.

86818897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7892638.

The product of its digits is 1548288, while the sum is 55.

The square root of 86818897 is about 9317.6658557817. The cubic root of 86818897 is about 442.7970865045.

It can be divided in two parts, 8681 and 8897, that added together give a triangular number (17578 = T₁₈₇).

The spelling of 86818897 in words is "eighty-six million, eight hundred eighteen thousand, eight hundred ninety-seven".