68399691 has 8 divisors (see below), whose sum is σ = 92007120. Its totient is φ = 45196032.

The previous prime is 68399689. The next prime is 68399699. The reversal of 68399691 is 19699386.

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

It is not a de Polignac number, because 68399691 - 2¹ = 68399689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68399699) 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, 100546 + ... + 101223.

It is an arithmetic number, because the mean of its divisors is an integer number (11500890).

Almost surely, 2^68399691 is an apocalyptic number.

68399691 is a deficient number, since it is larger than the sum of its proper divisors (23607429).

68399691 is a wasteful number, since it uses less digits than its factorization.

68399691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201885.

The product of its digits is 629856, while the sum is 51.

The square root of 68399691 is about 8270.4105702196. The cubic root of 68399691 is about 408.9636547271.

The spelling of 68399691 in words is "sixty-eight million, three hundred ninety-nine thousand, six hundred ninety-one".