68999517 has 12 divisors (see below), whose sum is σ = 103999584. Its totient is φ = 43999560.

The previous prime is 68999509. The next prime is 68999519. The reversal of 68999517 is 71599986.

It is not a de Polignac number, because 68999517 - 2³ = 68999509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68999519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166459 + ... + 166872.

It is an arithmetic number, because the mean of its divisors is an integer number (8666632).

Almost surely, 2^68999517 is an apocalyptic number.

It is an amenable number.

68999517 is a deficient number, since it is larger than the sum of its proper divisors (35000067).

68999517 is a wasteful number, since it uses less digits than its factorization.

68999517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333360 (or 333357 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 68999517 is about 8306.5947896837. The cubic root of 68999517 is about 410.1556359360.

The spelling of 68999517 in words is "sixty-eight million, nine hundred ninety-nine thousand, five hundred seventeen".