86691273 has 4 divisors (see below), whose sum is σ = 115588368. Its totient is φ = 57794180.

The previous prime is 86691257. The next prime is 86691277. The reversal of 86691273 is 37219668.

It is a happy number.

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 86691273 - 2⁴ = 86691257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86691277) 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, 14448543 + ... + 14448548.

It is an arithmetic number, because the mean of its divisors is an integer number (28897092).

Almost surely, 2^86691273 is an apocalyptic number.

It is an amenable number.

86691273 is a deficient number, since it is larger than the sum of its proper divisors (28897095).

86691273 is a wasteful number, since it uses less digits than its factorization.

86691273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28897094.

The product of its digits is 108864, while the sum is 42.

The square root of 86691273 is about 9310.8148408182. The cubic root of 86691273 is about 442.5800091528.

The spelling of 86691273 in words is "eighty-six million, six hundred ninety-one thousand, two hundred seventy-three".