68541599 has 4 divisors (see below), whose sum is σ = 78333264. Its totient is φ = 58749936.

The previous prime is 68541593. The next prime is 68541617. The reversal of 68541599 is 99514586.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99514586 = 2 ⋅49757293.

It is a de Polignac number, because none of the positive numbers 2^k-68541599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68541593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4895822 + ... + 4895835.

It is an arithmetic number, because the mean of its divisors is an integer number (19583316).

Almost surely, 2^68541599 is an apocalyptic number.

68541599 is a deficient number, since it is larger than the sum of its proper divisors (9791665).

68541599 is an equidigital number, since it uses as much as digits as its factorization.

68541599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9791664.

The product of its digits is 388800, while the sum is 47.

The square root of 68541599 is about 8278.9853846954. The cubic root of 68541599 is about 409.2462833213.

The spelling of 68541599 in words is "sixty-eight million, five hundred forty-one thousand, five hundred ninety-nine".