164974265 has 4 divisors (see below), whose sum is σ = 197969124. Its totient is φ = 131979408.

The previous prime is 164974259. The next prime is 164974289. The reversal of 164974265 is 562479461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 562479461 = 349 ⋅1611689.

It can be written as a sum of positive squares in 2 ways, for example, as 60341824 + 104632441 = 7768^2 + 10229^2 .

It is a cyclic number.

It is not a de Polignac number, because 164974265 - 2¹⁶ = 164908729 is a prime.

It is a super-2 number, since 2×164974265² = 54433016224580450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16497422 + ... + 16497431.

It is an arithmetic number, because the mean of its divisors is an integer number (49492281).

Almost surely, 2^164974265 is an apocalyptic number.

It is an amenable number.

164974265 is a deficient number, since it is larger than the sum of its proper divisors (32994859).

164974265 is an equidigital number, since it uses as much as digits as its factorization.

164974265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32994858.

The product of its digits is 362880, while the sum is 44.

The square root of 164974265 is about 12844.2308060857. The cubic root of 164974265 is about 548.4521383068.

The spelling of 164974265 in words is "one hundred sixty-four million, nine hundred seventy-four thousand, two hundred sixty-five".