83689913 has 8 divisors (see below), whose sum is σ = 84896640. Its totient is φ = 82490800.

The previous prime is 83689877. The next prime is 83690017. The reversal of 83689913 is 31998638.

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

It is a cyclic number.

It is not a de Polignac number, because 83689913 - 2¹² = 83685817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (83689013) 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, 22406 + ... + 25872.

It is an arithmetic number, because the mean of its divisors is an integer number (10612080).

Almost surely, 2^83689913 is an apocalyptic number.

It is an amenable number.

83689913 is a deficient number, since it is larger than the sum of its proper divisors (1206727).

83689913 is a wasteful number, since it uses less digits than its factorization.

83689913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3807.

The product of its digits is 279936, while the sum is 47.

The square root of 83689913 is about 9148.2191163089. The cubic root of 83689913 is about 437.4123479369.

It can be divided in two parts, 8368 and 9913, that added together give a palindrome (18281).

The spelling of 83689913 in words is "eighty-three million, six hundred eighty-nine thousand, nine hundred thirteen".