68120919 has 24 divisors (see below), whose sum is σ = 105344512. Its totient is φ = 43944120.

The previous prime is 68120911. The next prime is 68120939. The reversal of 68120919 is 91902186.

It is not a de Polignac number, because 68120919 - 2³ = 68120911 is a prime.

It is a super-2 number, since 2×68120919² = 9280919210809122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68120911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3012 + ... + 12054.

Almost surely, 2^68120919 is an apocalyptic number.

68120919 is a deficient number, since it is larger than the sum of its proper divisors (37223593).

68120919 is an equidigital number, since it uses as much as digits as its factorization.

68120919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9089 (or 9077 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 68120919 is about 8253.5397860554. The cubic root of 68120919 is about 408.4073030325.

It can be divided in two parts, 6812091 and 9, that added together give a square (6812100 = 2610²).

The spelling of 68120919 in words is "sixty-eight million, one hundred twenty thousand, nine hundred nineteen".