164195539 has 4 divisors (see below), whose sum is σ = 164713824. Its totient is φ = 163677256.

The previous prime is 164195491. The next prime is 164195621. The reversal of 164195539 is 935591461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 935591461 = 7 ⋅133655923.

It is a cyclic number.

It is not a de Polignac number, because 164195539 - 2⁷ = 164195411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164195495 and 164195504.

It is not an unprimeable number, because it can be changed into a prime (164195039) 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, 258667 + ... + 259300.

It is an arithmetic number, because the mean of its divisors is an integer number (41178456).

Almost surely, 2^164195539 is an apocalyptic number.

164195539 is a deficient number, since it is larger than the sum of its proper divisors (518285).

164195539 is an equidigital number, since it uses as much as digits as its factorization.

164195539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518284.

The product of its digits is 145800, while the sum is 43.

The square root of 164195539 is about 12813.8807158487. The cubic root of 164195539 is about 547.5878263088.

The spelling of 164195539 in words is "one hundred sixty-four million, one hundred ninety-five thousand, five hundred thirty-nine".