83866013 has 16 divisors (see below), whose sum is σ = 107389824. Its totient is φ = 63581760.

The previous prime is 83866009. The next prime is 83866021. The reversal of 83866013 is 31066838.

It is a happy number.

It is not a de Polignac number, because 83866013 - 2² = 83866009 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 (83866043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11870 + ... + 17567.

It is an arithmetic number, because the mean of its divisors is an integer number (6711864).

Almost surely, 2^83866013 is an apocalyptic number.

It is an amenable number.

83866013 is a deficient number, since it is larger than the sum of its proper divisors (23523811).

83866013 is a wasteful number, since it uses less digits than its factorization.

83866013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29492.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 83866013 is about 9157.8388826185. The cubic root of 83866013 is about 437.7189334708.

The spelling of 83866013 in words is "eighty-three million, eight hundred sixty-six thousand, thirteen".