68542923 has 4 divisors (see below), whose sum is σ = 91390568. Its totient is φ = 45695280.

The previous prime is 68542919. The next prime is 68542927. The reversal of 68542923 is 32924586.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (68542919) and next prime (68542927).

It is not a de Polignac number, because 68542923 - 2² = 68542919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68542927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11423818 + ... + 11423823.

It is an arithmetic number, because the mean of its divisors is an integer number (22847642).

Almost surely, 2^68542923 is an apocalyptic number.

68542923 is a deficient number, since it is larger than the sum of its proper divisors (22847645).

68542923 is a wasteful number, since it uses less digits than its factorization.

68542923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22847644.

The product of its digits is 103680, while the sum is 39.

The square root of 68542923 is about 8279.0653457984. The cubic root of 68542923 is about 409.2489184052.

The spelling of 68542923 in words is "sixty-eight million, five hundred forty-two thousand, nine hundred twenty-three".