86765849 has 4 divisors (see below), whose sum is σ = 86906640. Its totient is φ = 86625060.

The previous prime is 86765831. The next prime is 86765863. The reversal of 86765849 is 94856768.

86765849 = 20² + 21² + ... + 638².

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-86765849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86765849.

It is not an unprimeable number, because it can be changed into a prime (86765879) 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, 69467 + ... + 70704.

It is an arithmetic number, because the mean of its divisors is an integer number (21726660).

Almost surely, 2^86765849 is an apocalyptic number.

It is an amenable number.

86765849 is a deficient number, since it is larger than the sum of its proper divisors (140791).

86765849 is a wasteful number, since it uses less digits than its factorization.

86765849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140790.

The product of its digits is 2903040, while the sum is 53.

The square root of 86765849 is about 9314.8187851402. The cubic root of 86765849 is about 442.7068823114.

The spelling of 86765849 in words is "eighty-six million, seven hundred sixty-five thousand, eight hundred forty-nine".