86973709 has 4 divisors (see below), whose sum is σ = 86997340. Its totient is φ = 86950080.

The previous prime is 86973701. The next prime is 86973743. The reversal of 86973709 is 90737968.

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 66015625 + 20958084 = 8125^2 + 4578^2 .

It is a cyclic number.

It is not a de Polignac number, because 86973709 - 2³ = 86973701 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 (86973701) 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, 4974 + ... + 14095.

It is an arithmetic number, because the mean of its divisors is an integer number (21749335).

Almost surely, 2^86973709 is an apocalyptic number.

It is an amenable number.

86973709 is a deficient number, since it is larger than the sum of its proper divisors (23631).

86973709 is a wasteful number, since it uses less digits than its factorization.

86973709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23630.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 86973709 is about 9325.9696010656. The cubic root of 86973709 is about 443.0601229318.

The spelling of 86973709 in words is "eighty-six million, nine hundred seventy-three thousand, seven hundred nine".