68875481 has 2 divisors, whose sum is σ = 68875482. Its totient is φ = 68875480.

The previous prime is 68875451. The next prime is 68875489. The reversal of 68875481 is 18457886.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68641225 + 234256 = 8285^2 + 484^2 .

It is a cyclic number.

It is not a de Polignac number, because 68875481 - 2¹⁰ = 68874457 is a prime.

It is a super-2 number, since 2×68875481² = 9487663765962722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68875489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34437740 + 34437741.

It is an arithmetic number, because the mean of its divisors is an integer number (34437741).

Almost surely, 2^68875481 is an apocalyptic number.

It is an amenable number.

68875481 is a deficient number, since it is larger than the sum of its proper divisors (1).

68875481 is an equidigital number, since it uses as much as digits as its factorization.

68875481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 430080, while the sum is 47.

The square root of 68875481 is about 8299.1253153570. The cubic root of 68875481 is about 409.9097183726.

The spelling of 68875481 in words is "sixty-eight million, eight hundred seventy-five thousand, four hundred eighty-one".