161449013 has 4 divisors (see below), whose sum is σ = 176126208. Its totient is φ = 146771820.

The previous prime is 161448997. The next prime is 161449039. The reversal of 161449013 is 310944161.

161449013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 161449013 - 2⁴ = 161448997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161443013) 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, 7338581 + ... + 7338602.

It is an arithmetic number, because the mean of its divisors is an integer number (44031552).

Almost surely, 2^161449013 is an apocalyptic number.

It is an amenable number.

161449013 is a deficient number, since it is larger than the sum of its proper divisors (14677195).

161449013 is a wasteful number, since it uses less digits than its factorization.

161449013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14677194.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 161449013 is about 12706.2588120973. The cubic root of 161449013 is about 544.5174450944.

The spelling of 161449013 in words is "one hundred sixty-one million, four hundred forty-nine thousand, thirteen".