83867681 has 16 divisors (see below), whose sum is σ = 92327040. Its totient is φ = 75828480.

The previous prime is 83867671. The next prime is 83867689. The reversal of 83867681 is 18676838.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83867681 is a prime.

It is a super-2 number, since 2×83867681² = 14067575832635522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83867689) 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, 153050 + ... + 153596.

It is an arithmetic number, because the mean of its divisors is an integer number (5770440).

Almost surely, 2^83867681 is an apocalyptic number.

It is an amenable number.

83867681 is a deficient number, since it is larger than the sum of its proper divisors (8459359).

83867681 is a wasteful number, since it uses less digits than its factorization.

83867681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904.

The product of its digits is 387072, while the sum is 47.

The square root of 83867681 is about 9157.9299516867. The cubic root of 83867681 is about 437.7218353628.

It can be divided in two parts, 83867 and 681, that added together give a palindrome (84548).

The spelling of 83867681 in words is "eighty-three million, eight hundred sixty-seven thousand, six hundred eighty-one".