68538499 has 4 divisors (see below), whose sum is σ = 69217200. Its totient is φ = 67859800.

The previous prime is 68538493. The next prime is 68538523. The reversal of 68538499 is 99483586.

It is a happy number.

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 68538499 - 2¹³ = 68530307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68538493) 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, 339199 + ... + 339400.

It is an arithmetic number, because the mean of its divisors is an integer number (17304300).

Almost surely, 2^68538499 is an apocalyptic number.

68538499 is a deficient number, since it is larger than the sum of its proper divisors (678701).

68538499 is a wasteful number, since it uses less digits than its factorization.

68538499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678700.

The product of its digits is 1866240, while the sum is 52.

The square root of 68538499 is about 8278.7981615691. The cubic root of 68538499 is about 409.2401134302.

The spelling of 68538499 in words is "sixty-eight million, five hundred thirty-eight thousand, four hundred ninety-nine".