164520719 has 4 divisors (see below), whose sum is σ = 179477160. Its totient is φ = 149564280.

The previous prime is 164520701. The next prime is 164520731. The reversal of 164520719 is 917025461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 917025461 = 11 ⋅83365951.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164520719 is a prime.

It is a super-2 number, since 2×164520719² = 54134133960553922, 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 (164520119) 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, 7478204 + ... + 7478225.

It is an arithmetic number, because the mean of its divisors is an integer number (44869290).

Almost surely, 2^164520719 is an apocalyptic number.

164520719 is a deficient number, since it is larger than the sum of its proper divisors (14956441).

164520719 is a wasteful number, since it uses less digits than its factorization.

164520719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14956440.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 164520719 is about 12826.5630236630. The cubic root of 164520719 is about 547.9490768654.

The spelling of 164520719 in words is "one hundred sixty-four million, five hundred twenty thousand, seven hundred nineteen".