165737449 has 4 divisors (see below), whose sum is σ = 166835200. Its totient is φ = 164639700.

The previous prime is 165737447. The next prime is 165737459. The reversal of 165737449 is 944737561.

165737449 = T₁₀₅₁₀ + T₁₀₅₁₁ + T₁₀₅₁₂.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165737449 - 2¹ = 165737447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165737399 and 165737408.

It is not an unprimeable number, because it can be changed into a prime (165737441) 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, 548649 + ... + 548950.

It is an arithmetic number, because the mean of its divisors is an integer number (41708800).

Almost surely, 2^165737449 is an apocalyptic number.

165737449 is the 10512-nd centered triangular number.

It is an amenable number.

165737449 is a deficient number, since it is larger than the sum of its proper divisors (1097751).

165737449 is a wasteful number, since it uses less digits than its factorization.

165737449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097750.

The product of its digits is 635040, while the sum is 46.

The square root of 165737449 is about 12873.9057399066. The cubic root of 165737449 is about 549.2965651726.

The spelling of 165737449 in words is "one hundred sixty-five million, seven hundred thirty-seven thousand, four hundred forty-nine".