68888961 has 10 divisors (see below), whose sum is σ = 102908322. Its totient is φ = 45925920.

The previous prime is 68888951. The next prime is 68888977. The reversal of 68888961 is 16988886.

It can be written as a sum of positive squares in only one way, i.e., 49914225 + 18974736 = 7065^2 + 4356^2 .

It is not a de Polignac number, because 68888961 - 2⁵ = 68888929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68888898 and 68888907.

It is not an unprimeable number, because it can be changed into a prime (68888951) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 425160 + ... + 425321.

Almost surely, 2^68888961 is an apocalyptic number.

It is an amenable number.

68888961 is a deficient number, since it is larger than the sum of its proper divisors (34019361).

68888961 is an equidigital number, since it uses as much as digits as its factorization.

68888961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850493 (or 850484 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 54.

The square root of 68888961 is about 8299.9374094026. The cubic root of 68888961 is about 409.9364585249.

The spelling of 68888961 in words is "sixty-eight million, eight hundred eighty-eight thousand, nine hundred sixty-one".