68618953 has 16 divisors (see below), whose sum is σ = 80163216. Its totient is φ = 58152960.

The previous prime is 68618933. The next prime is 68618969. The reversal of 68618953 is 35981686.

It can be written as a sum of positive squares in 8 ways, for example, as 110224 + 68508729 = 332^2 + 8277^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68618953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68618923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5275 + ... + 12847.

It is an arithmetic number, because the mean of its divisors is an integer number (5010201).

Almost surely, 2^68618953 is an apocalyptic number.

It is an amenable number.

68618953 is a deficient number, since it is larger than the sum of its proper divisors (11544263).

68618953 is a wasteful number, since it uses less digits than its factorization.

68618953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7644.

The product of its digits is 311040, while the sum is 46.

The square root of 68618953 is about 8283.6557750790. The cubic root of 68618953 is about 409.4001798159.

The spelling of 68618953 in words is "sixty-eight million, six hundred eighteen thousand, nine hundred fifty-three".