86911973 has 4 divisors (see below), whose sum is σ = 92024460. Its totient is φ = 81799488.

The previous prime is 86911967. The next prime is 86911991. The reversal of 86911973 is 37911968.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55920484 + 30991489 = 7478^2 + 5567^2 .

It is a cyclic number.

It is not a de Polignac number, because 86911973 - 2²⁶ = 19803109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86911373) 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, 2556218 + ... + 2556251.

It is an arithmetic number, because the mean of its divisors is an integer number (23006115).

Almost surely, 2^86911973 is an apocalyptic number.

It is an amenable number.

86911973 is a deficient number, since it is larger than the sum of its proper divisors (5112487).

86911973 is a wasteful number, since it uses less digits than its factorization.

86911973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5112486.

The product of its digits is 81648, while the sum is 44.

The square root of 86911973 is about 9322.6591163680. The cubic root of 86911973 is about 442.9552665927.

The spelling of 86911973 in words is "eighty-six million, nine hundred eleven thousand, nine hundred seventy-three".