164709871 has 4 divisors (see below), whose sum is σ = 164740912. Its totient is φ = 164678832.

The previous prime is 164709869. The next prime is 164709899. The reversal of 164709871 is 178907461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178907461 = 101 ⋅1771361.

It is a cyclic number.

It is not a de Polignac number, because 164709871 - 2¹ = 164709869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164700871) 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, 5331 + ... + 18916.

It is an arithmetic number, because the mean of its divisors is an integer number (41185228).

Almost surely, 2^164709871 is an apocalyptic number.

164709871 is a deficient number, since it is larger than the sum of its proper divisors (31041).

164709871 is an equidigital number, since it uses as much as digits as its factorization.

164709871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31040.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 164709871 is about 12833.9343538916. The cubic root of 164709871 is about 548.1589915979.

The spelling of 164709871 in words is "one hundred sixty-four million, seven hundred nine thousand, eight hundred seventy-one".