68999519 has 2 divisors, whose sum is σ = 68999520. Its totient is φ = 68999518.

The previous prime is 68999509. The next prime is 68999537. The reversal of 68999519 is 91599986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68999519 - 2²⁰ = 67950943 is a prime.

It is a super-2 number, since 2×68999519² = 9521867244462722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68999509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34499759 + 34499760.

It is an arithmetic number, because the mean of its divisors is an integer number (34499760).

Almost surely, 2^68999519 is an apocalyptic number.

68999519 is a deficient number, since it is larger than the sum of its proper divisors (1).

68999519 is an equidigital number, since it uses as much as digits as its factorization.

68999519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1574640, while the sum is 56.

The square root of 68999519 is about 8306.5949100699. The cubic root of 68999519 is about 410.1556398988.

The spelling of 68999519 in words is "sixty-eight million, nine hundred ninety-nine thousand, five hundred nineteen".