83706681 has 8 divisors (see below), whose sum is σ = 114204640. Its totient is φ = 54506592.

The previous prime is 83706661. The next prime is 83706709. The reversal of 83706681 is 18660738.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 83706681 - 2²³ = 75318073 is a prime.

It is a super-2 number, since 2×83706681² = 14013616888071522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83706631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324316 + ... + 324573.

It is an arithmetic number, because the mean of its divisors is an integer number (14275580).

Almost surely, 2^83706681 is an apocalyptic number.

It is an amenable number.

83706681 is a deficient number, since it is larger than the sum of its proper divisors (30497959).

83706681 is a wasteful number, since it uses less digits than its factorization.

83706681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648935.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 83706681 is about 9149.1355329342. The cubic root of 83706681 is about 437.4415591054.

It can be divided in two parts, 8370 and 6681, that added together give a palindrome (15051).

The spelling of 83706681 in words is "eighty-three million, seven hundred six thousand, six hundred eighty-one".