68668953 has 4 divisors (see below), whose sum is σ = 91558608. Its totient is φ = 45779300.

The previous prime is 68668949. The next prime is 68668997. The reversal of 68668953 is 35986686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68668953 - 2² = 68668949 is a prime.

It is a super-2 number, since 2×68668953² = 9430850212232418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68668896 and 68668905.

It is not an unprimeable number, because it can be changed into a prime (68668913) 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, 11444823 + ... + 11444828.

It is an arithmetic number, because the mean of its divisors is an integer number (22889652).

Almost surely, 2^68668953 is an apocalyptic number.

It is an amenable number.

68668953 is a deficient number, since it is larger than the sum of its proper divisors (22889655).

68668953 is a wasteful number, since it uses less digits than its factorization.

68668953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22889654.

The product of its digits is 1866240, while the sum is 51.

The square root of 68668953 is about 8286.6732166775. The cubic root of 68668953 is about 409.4995937446.

The spelling of 68668953 in words is "sixty-eight million, six hundred sixty-eight thousand, nine hundred fifty-three".