168368719 has 4 divisors (see below), whose sum is σ = 173800000. Its totient is φ = 162937440.

The previous prime is 168368689. The next prime is 168368729. The reversal of 168368719 is 917863861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 917863861 = 101 ⋅9087761.

It is a cyclic number.

It is not a de Polignac number, because 168368719 - 2²⁵ = 134814287 is a prime.

It is a super-2 number, since 2×168368719² = 56696051075401922, 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 (168368729) 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, 2715594 + ... + 2715655.

It is an arithmetic number, because the mean of its divisors is an integer number (43450000).

Almost surely, 2^168368719 is an apocalyptic number.

168368719 is a deficient number, since it is larger than the sum of its proper divisors (5431281).

168368719 is an equidigital number, since it uses as much as digits as its factorization.

168368719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5431280.

The product of its digits is 435456, while the sum is 49.

The square root of 168368719 is about 12975.6972452350. The cubic root of 168368719 is about 552.1882179950.

The spelling of 168368719 in words is "one hundred sixty-eight million, three hundred sixty-eight thousand, seven hundred nineteen".