68418019 has 4 divisors (see below), whose sum is σ = 68448744. Its totient is φ = 68387296.

The previous prime is 68418001. The next prime is 68418037. The reversal of 68418019 is 91081486.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (68418001) and next prime (68418037).

It is a cyclic number.

It is not a de Polignac number, because 68418019 - 2⁷ = 68417891 is a prime.

It is a super-2 number, since 2×68418019² = 9362050647768722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68418079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11737 + ... + 16570.

It is an arithmetic number, because the mean of its divisors is an integer number (17112186).

Almost surely, 2^68418019 is an apocalyptic number.

68418019 is a deficient number, since it is larger than the sum of its proper divisors (30725).

68418019 is a wasteful number, since it uses less digits than its factorization.

68418019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30724.

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

The square root of 68418019 is about 8271.5185425652. The cubic root of 68418019 is about 409.0001793389. Note that the first 3 decimals are identical.

The spelling of 68418019 in words is "sixty-eight million, four hundred eighteen thousand, nineteen".