164942649 has 15 divisors (see below), whose sum is σ = 246568597. Its totient is φ = 109884708.

The previous prime is 164942639. The next prime is 164942651. The reversal of 164942649 is 946249461.

The square root of 164942649 is 12843.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 164942649 - 2⁹ = 164942137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164942639) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 114874 + ... + 116300.

Almost surely, 2^164942649 is an apocalyptic number.

164942649 is the 12843-rd square number.

164942649 is the 6422-nd centered octagonal number.

It is an amenable number.

164942649 is a deficient number, since it is larger than the sum of its proper divisors (81625948).

164942649 is an frugal number, since it uses more digits than its factorization.

164942649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2866 (or 1430 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The cubic root of 164942649 is about 548.4171005781.

The spelling of 164942649 in words is "one hundred sixty-four million, nine hundred forty-two thousand, six hundred forty-nine".