165199249 has 4 divisors (see below), whose sum is σ = 169041136. Its totient is φ = 161357364.

The previous prime is 165199247. The next prime is 165199267. The reversal of 165199249 is 942991561.

It is a happy number.

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 165199249 - 2¹ = 165199247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165199199 and 165199208.

It is not an unprimeable number, because it can be changed into a prime (165199247) 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, 1920879 + ... + 1920964.

It is an arithmetic number, because the mean of its divisors is an integer number (42260284).

Almost surely, 2^165199249 is an apocalyptic number.

It is an amenable number.

165199249 is a deficient number, since it is larger than the sum of its proper divisors (3841887).

165199249 is an equidigital number, since it uses as much as digits as its factorization.

165199249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3841886.

The product of its digits is 174960, while the sum is 46.

The square root of 165199249 is about 12852.9859954798. The cubic root of 165199249 is about 548.7013426415.

The spelling of 165199249 in words is "one hundred sixty-five million, one hundred ninety-nine thousand, two hundred forty-nine".