68644279 has 8 divisors (see below), whose sum is σ = 75132288. Its totient is φ = 62197560.

The previous prime is 68644267. The next prime is 68644307. The reversal of 68644279 is 97244686.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 68644279 - 2¹⁵ = 68611511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68644229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6787 + ... + 13540.

It is an arithmetic number, because the mean of its divisors is an integer number (9391536).

Almost surely, 2^68644279 is an apocalyptic number.

68644279 is a deficient number, since it is larger than the sum of its proper divisors (6488009).

68644279 is a wasteful number, since it uses less digits than its factorization.

68644279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20645.

The product of its digits is 580608, while the sum is 46.

The square root of 68644279 is about 8285.1843069421. The cubic root of 68644279 is about 409.4505409924.

The spelling of 68644279 in words is "sixty-eight million, six hundred forty-four thousand, two hundred seventy-nine".