68935947 has 4 divisors (see below), whose sum is σ = 91914600. Its totient is φ = 45957296.

The previous prime is 68935939. The next prime is 68935957. The reversal of 68935947 is 74953986.

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 68935947 - 2³ = 68935939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68935947.

It is not an unprimeable number, because it can be changed into a prime (68935907) 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, 11489322 + ... + 11489327.

It is an arithmetic number, because the mean of its divisors is an integer number (22978650).

Almost surely, 2^68935947 is an apocalyptic number.

68935947 is a deficient number, since it is larger than the sum of its proper divisors (22978653).

68935947 is a wasteful number, since it uses less digits than its factorization.

68935947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22978652.

The product of its digits is 1632960, while the sum is 51.

The square root of 68935947 is about 8302.7674302006. The cubic root of 68935947 is about 410.0296369613.

The spelling of 68935947 in words is "sixty-eight million, nine hundred thirty-five thousand, nine hundred forty-seven".