68401189 has 2 divisors, whose sum is σ = 68401190. Its totient is φ = 68401188.

The previous prime is 68401181. The next prime is 68401211. The reversal of 68401189 is 98110486.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41796225 + 26604964 = 6465^2 + 5158^2 .

It is a cyclic number.

It is not a de Polignac number, because 68401189 - 2³ = 68401181 is a prime.

It is a super-2 number, since 2×68401189² = 9357445313227442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68401181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34200594 + 34200595.

It is an arithmetic number, because the mean of its divisors is an integer number (34200595).

Almost surely, 2^68401189 is an apocalyptic number.

It is an amenable number.

68401189 is a deficient number, since it is larger than the sum of its proper divisors (1).

68401189 is an equidigital number, since it uses as much as digits as its factorization.

68401189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 68401189 is about 8270.5011335469. The cubic root of 68401189 is about 408.9666402332.

The spelling of 68401189 in words is "sixty-eight million, four hundred one thousand, one hundred eighty-nine".