68908961 has 8 divisors (see below), whose sum is σ = 75246624. Its totient is φ = 62583520.

The previous prime is 68908949. The next prime is 68908969. The reversal of 68908961 is 16980986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68908961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68908969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11981 + ... + 16773.

It is an arithmetic number, because the mean of its divisors is an integer number (9405828).

Almost surely, 2^68908961 is an apocalyptic number.

68908961 is the 4793-rd octagonal number.

It is an amenable number.

68908961 is a deficient number, since it is larger than the sum of its proper divisors (6337663).

68908961 is a wasteful number, since it uses less digits than its factorization.

68908961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6111.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 68908961 is about 8301.1421503309. The cubic root of 68908961 is about 409.9761259150.

It can be divided in two parts, 6890 and 8961, that added together give a palindrome (15851).

The spelling of 68908961 in words is "sixty-eight million, nine hundred eight thousand, nine hundred sixty-one".