86820653 has 4 divisors (see below), whose sum is σ = 90595488. Its totient is φ = 83045820.

The previous prime is 86820647. The next prime is 86820691. The reversal of 86820653 is 35602868.

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 86820653 - 2⁴ = 86820637 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 (86820623) 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, 1887383 + ... + 1887428.

It is an arithmetic number, because the mean of its divisors is an integer number (22648872).

Almost surely, 2^86820653 is an apocalyptic number.

It is an amenable number.

86820653 is a deficient number, since it is larger than the sum of its proper divisors (3774835).

86820653 is a wasteful number, since it uses less digits than its factorization.

86820653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3774834.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 86820653 is about 9317.7600849131. The cubic root of 86820653 is about 442.8000718240.

The spelling of 86820653 in words is "eighty-six million, eight hundred twenty thousand, six hundred fifty-three".