68402279 has 8 divisors (see below), whose sum is σ = 74685072. Its totient is φ = 62130240.

The previous prime is 68402267. The next prime is 68402281. The reversal of 68402279 is 97220486.

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 68402279 - 2²⁰ = 67353703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68402219) 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, 16787 + ... + 20459.

It is an arithmetic number, because the mean of its divisors is an integer number (9335634).

Almost surely, 2^68402279 is an apocalyptic number.

68402279 is a deficient number, since it is larger than the sum of its proper divisors (6282793).

68402279 is a wasteful number, since it uses less digits than its factorization.

68402279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5377.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 68402279 is about 8270.5670301377. The cubic root of 68402279 is about 408.9688125700.

It can be divided in two parts, 6840 and 2279, that added together give a palindrome (9119).

The spelling of 68402279 in words is "sixty-eight million, four hundred two thousand, two hundred seventy-nine".