68537499 has 8 divisors (see below), whose sum is σ = 92484672. Its totient is φ = 45141000.

The previous prime is 68537479. The next prime is 68537509. The reversal of 68537499 is 99473586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68537499 - 2⁸ = 68537243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68537479) 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 7 ways as a sum of consecutive naturals, for example, 137377 + ... + 137874.

It is an arithmetic number, because the mean of its divisors is an integer number (11560584).

Almost surely, 2^68537499 is an apocalyptic number.

68537499 is a deficient number, since it is larger than the sum of its proper divisors (23947173).

68537499 is a wasteful number, since it uses less digits than its factorization.

68537499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275337.

The product of its digits is 1632960, while the sum is 51.

The square root of 68537499 is about 8278.7377661090. The cubic root of 68537499 is about 409.2381231030.

The spelling of 68537499 in words is "sixty-eight million, five hundred thirty-seven thousand, four hundred ninety-nine".