68889131 has 2 divisors, whose sum is σ = 68889132. Its totient is φ = 68889130.

The previous prime is 68889089. The next prime is 68889157. The reversal of 68889131 is 13198886.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68889131 is a prime.

It is a super-2 number, since 2×68889131² = 9491424739870322, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (68889031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34444565 + 34444566.

It is an arithmetic number, because the mean of its divisors is an integer number (34444566).

Almost surely, 2^68889131 is an apocalyptic number.

68889131 is a deficient number, since it is larger than the sum of its proper divisors (1).

68889131 is an equidigital number, since it uses as much as digits as its factorization.

68889131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 44.

The square root of 68889131 is about 8299.9476504373. The cubic root of 68889131 is about 409.9367957301.

The spelling of 68889131 in words is "sixty-eight million, eight hundred eighty-nine thousand, one hundred thirty-one".