68542379 has 4 divisors (see below), whose sum is σ = 68611320. Its totient is φ = 68473440.

The previous prime is 68542349. The next prime is 68542393. The reversal of 68542379 is 97324586.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68542379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68542339) 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, 32957 + ... + 34974.

It is an arithmetic number, because the mean of its divisors is an integer number (17152830).

Almost surely, 2^68542379 is an apocalyptic number.

68542379 is a deficient number, since it is larger than the sum of its proper divisors (68941).

68542379 is a wasteful number, since it uses less digits than its factorization.

68542379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68940.

The product of its digits is 362880, while the sum is 44.

The square root of 68542379 is about 8279.0324917831. The cubic root of 68542379 is about 409.2478357162.

It can be divided in two parts, 68542 and 379, that added together give a cube (68921 = 41³).

The spelling of 68542379 in words is "sixty-eight million, five hundred forty-two thousand, three hundred seventy-nine".