68888997 has 12 divisors (see below), whose sum is σ = 99777964. Its totient is φ = 45800640.

The previous prime is 68888977. The next prime is 68888999. The reversal of 68888997 is 79988886.

It can be written as a sum of positive squares in 2 ways, for example, as 40947201 + 27941796 = 6399^2 + 5286^2 .

It is not a de Polignac number, because 68888997 - 2¹⁴ = 68872613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68888999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6904 + ... + 13617.

Almost surely, 2^68888997 is an apocalyptic number.

It is an amenable number.

68888997 is a deficient number, since it is larger than the sum of its proper divisors (30888967).

68888997 is a wasteful number, since it uses less digits than its factorization.

68888997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20900 (or 20897 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 63.

The square root of 68888997 is about 8299.9395780933. The cubic root of 68888997 is about 409.9365299331.

The spelling of 68888997 in words is "sixty-eight million, eight hundred eighty-eight thousand, nine hundred ninety-seven".