68589139 has 2 divisors, whose sum is σ = 68589140. Its totient is φ = 68589138.

The previous prime is 68589127. The next prime is 68589167. The reversal of 68589139 is 93198586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68589139 - 2⁷ = 68589011 is a prime.

It is a super-2 number, since 2×68589139² = 9408939977522642, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 68589092 and 68589101.

It is not a weakly prime, because it can be changed into another prime (68589109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34294569 + 34294570.

It is an arithmetic number, because the mean of its divisors is an integer number (34294570).

Almost surely, 2^68589139 is an apocalyptic number.

68589139 is a deficient number, since it is larger than the sum of its proper divisors (1).

68589139 is an equidigital number, since it uses as much as digits as its factorization.

68589139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 49.

The square root of 68589139 is about 8281.8560117887. The cubic root of 68589139 is about 409.3408782935.

The spelling of 68589139 in words is "sixty-eight million, five hundred eighty-nine thousand, one hundred thirty-nine".