86642273 has 4 divisors (see below), whose sum is σ = 86711088. Its totient is φ = 86573460.

The previous prime is 86642263. The next prime is 86642279. The reversal of 86642273 is 37224668.

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 a de Polignac number, because none of the positive numbers 2^k-86642273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86642279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32483 + ... + 35048.

It is an arithmetic number, because the mean of its divisors is an integer number (21677772).

Almost surely, 2^86642273 is an apocalyptic number.

It is an amenable number.

86642273 is a deficient number, since it is larger than the sum of its proper divisors (68815).

86642273 is a wasteful number, since it uses less digits than its factorization.

86642273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68814.

The product of its digits is 96768, while the sum is 38.

The square root of 86642273 is about 9308.1831202443. The cubic root of 86642273 is about 442.4966078027.

The spelling of 86642273 in words is "eighty-six million, six hundred forty-two thousand, two hundred seventy-three".