68499643 has 4 divisors (see below), whose sum is σ = 70170408. Its totient is φ = 66828880.

The previous prime is 68499637. The next prime is 68499659. The reversal of 68499643 is 34699486.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68499643 - 2⁵ = 68499611 is a prime.

It is a super-2 number, since 2×68499643² = 9384402182254898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68499143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 835321 + ... + 835402.

It is an arithmetic number, because the mean of its divisors is an integer number (17542602).

Almost surely, 2^68499643 is an apocalyptic number.

68499643 is a deficient number, since it is larger than the sum of its proper divisors (1670765).

68499643 is a wasteful number, since it uses less digits than its factorization.

68499643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670764.

The product of its digits is 1119744, while the sum is 49.

The square root of 68499643 is about 8276.4511114366. The cubic root of 68499643 is about 409.1627630359.

The spelling of 68499643 in words is "sixty-eight million, four hundred ninety-nine thousand, six hundred forty-three".