68409259 has 4 divisors (see below), whose sum is σ = 70000216. Its totient is φ = 66818304.

The previous prime is 68409247. The next prime is 68409277. The reversal of 68409259 is 95290486.

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 68409259 - 2¹⁵ = 68376491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 1590913 = 68409259 / (6 + 8 + 4 + 0 + 9 + 2 + 5 + 9).

It is not an unprimeable number, because it can be changed into a prime (68409239) 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, 795414 + ... + 795499.

It is an arithmetic number, because the mean of its divisors is an integer number (17500054).

Almost surely, 2^68409259 is an apocalyptic number.

68409259 is a deficient number, since it is larger than the sum of its proper divisors (1590957).

68409259 is a wasteful number, since it uses less digits than its factorization.

68409259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590956.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 68409259 is about 8270.9889976955. The cubic root of 68409259 is about 408.9827229507.

The spelling of 68409259 in words is "sixty-eight million, four hundred nine thousand, two hundred fifty-nine".