68909567 has 16 divisors (see below), whose sum is σ = 72591360. Its totient is φ = 65359008.

The previous prime is 68909563. The next prime is 68909569. The reversal of 68909567 is 76590986.

It is a cyclic number.

It is not a de Polignac number, because 68909567 - 2² = 68909563 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 (68909563) 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, 248633 + ... + 248909.

It is an arithmetic number, because the mean of its divisors is an integer number (4536960).

Almost surely, 2^68909567 is an apocalyptic number.

68909567 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

68909567 is a deficient number, since it is larger than the sum of its proper divisors (3681793).

68909567 is a wasteful number, since it uses less digits than its factorization.

68909567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 68909567 is about 8301.1786512519. The cubic root of 68909567 is about 409.9773277171.

The spelling of 68909567 in words is "sixty-eight million, nine hundred nine thousand, five hundred sixty-seven".