68135583 has 16 divisors (see below), whose sum is σ = 92632320. Its totient is φ = 44537856.

The previous prime is 68135533. The next prime is 68135603. The reversal of 68135583 is 38553186.

It is not a de Polignac number, because 68135583 - 2¹³ = 68127391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68135503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50998 + ... + 52316.

It is an arithmetic number, because the mean of its divisors is an integer number (5789520).

Almost surely, 2^68135583 is an apocalyptic number.

68135583 is a deficient number, since it is larger than the sum of its proper divisors (24496737).

68135583 is a wasteful number, since it uses less digits than its factorization.

68135583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646.

The product of its digits is 86400, while the sum is 39.

The square root of 68135583 is about 8254.4280843678. The cubic root of 68135583 is about 408.4366060968.

The spelling of 68135583 in words is "sixty-eight million, one hundred thirty-five thousand, five hundred eighty-three".