68889019 has 2 divisors, whose sum is σ = 68889020.
Its totient is φ = 68889018.
The previous prime is 68888999. The next prime is 68889031. The reversal of 68889019 is 91098886.
It is a happy number.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 68889019 - 29 = 68888507 is a prime.
It is a super-2 number, since 2×688890192 = 9491393877564722, which contains 22 as substring.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (68889059) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34444509 + 34444510.
It is an arithmetic number, because the mean of its divisors is an integer number (34444510).
Almost surely, 268889019 is an apocalyptic number.
68889019 is a deficient number, since it is larger than the sum of its proper divisors (1).
68889019 is an equidigital number, since it uses as much as digits as its factorization.
68889019 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 248832, while the sum is 49.
The square root of 68889019 is about 8299.9409034041.
The cubic root of 68889019 is about 409.9365735714.
The spelling of 68889019 in words is "sixty-eight million, eight hundred eighty-nine thousand, nineteen".