68170919 has 4 divisors (see below), whose sum is σ = 71134896. Its totient is φ = 65206944.

The previous prime is 68170849. The next prime is 68170937. The reversal of 68170919 is 91907186.

It is a happy number.

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 68170919 - 2¹² = 68166823 is a prime.

It is a super-2 number, since 2×68170919² = 9294548394609122, 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 (68170939) 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, 1481954 + ... + 1481999.

It is an arithmetic number, because the mean of its divisors is an integer number (17783724).

Almost surely, 2^68170919 is an apocalyptic number.

68170919 is a deficient number, since it is larger than the sum of its proper divisors (2963977).

68170919 is a wasteful number, since it uses less digits than its factorization.

68170919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2963976.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 68170919 is about 8256.5682338366. The cubic root of 68170919 is about 408.5072007408.

The spelling of 68170919 in words is "sixty-eight million, one hundred seventy thousand, nine hundred nineteen".