68522919 has 4 divisors (see below), whose sum is σ = 91363896. Its totient is φ = 45681944.

The previous prime is 68522893. The next prime is 68522921. The reversal of 68522919 is 91922586.

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

It is a cyclic number.

It is not a de Polignac number, because 68522919 - 2⁵ = 68522887 is a prime.

It is a super-2 number, since 2×68522919² = 9390780856561122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68522999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11420484 + ... + 11420489.

It is an arithmetic number, because the mean of its divisors is an integer number (22840974).

Almost surely, 2^68522919 is an apocalyptic number.

68522919 is a deficient number, since it is larger than the sum of its proper divisors (22840977).

68522919 is a wasteful number, since it uses less digits than its factorization.

68522919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22840976.

The product of its digits is 77760, while the sum is 42.

The square root of 68522919 is about 8277.8571502533. The cubic root of 68522919 is about 409.2091019342.

The spelling of 68522919 in words is "sixty-eight million, five hundred twenty-two thousand, nine hundred nineteen".