68438849 has 4 divisors (see below), whose sum is σ = 68514240. Its totient is φ = 68363460.

The previous prime is 68438837. The next prime is 68438861. The reversal of 68438849 is 94883486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94883486 = 2 ⋅47441743.

It is an interprime number because it is at equal distance from previous prime (68438837) and next prime (68438861).

It is a cyclic number.

It is not a de Polignac number, because 68438849 - 2⁴ = 68438833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68438797 and 68438806.

It is not an unprimeable number, because it can be changed into a prime (68438809) 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, 36317 + ... + 38154.

It is an arithmetic number, because the mean of its divisors is an integer number (17128560).

Almost surely, 2^68438849 is an apocalyptic number.

It is an amenable number.

68438849 is a deficient number, since it is larger than the sum of its proper divisors (75391).

68438849 is an equidigital number, since it uses as much as digits as its factorization.

68438849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75390.

The product of its digits is 1327104, while the sum is 50.

The square root of 68438849 is about 8272.7775867601. Note that the first 3 decimals coincide. The cubic root of 68438849 is about 409.0416820961.

The spelling of 68438849 in words is "sixty-eight million, four hundred thirty-eight thousand, eight hundred forty-nine".