169156049 has 4 divisors (see below), whose sum is σ = 169184064. Its totient is φ = 169128036.

The previous prime is 169156003. The next prime is 169156051. The reversal of 169156049 is 940651961.

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 169156049 - 2¹² = 169151953 is a prime.

It is a super-2 number, since 2×169156049² = 57227537826580802, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 169155997 and 169156015.

It is not an unprimeable number, because it can be changed into a prime (169156349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 797 + ... + 18410.

It is an arithmetic number, because the mean of its divisors is an integer number (42296016).

Almost surely, 2^169156049 is an apocalyptic number.

It is an amenable number.

169156049 is a deficient number, since it is larger than the sum of its proper divisors (28015).

169156049 is an equidigital number, since it uses as much as digits as its factorization.

169156049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28014.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 169156049 is about 13006.0004997693. Note that the first 3 decimals coincide. The cubic root of 169156049 is about 553.0475986005.

The spelling of 169156049 in words is "one hundred sixty-nine million, one hundred fifty-six thousand, forty-nine".