161138413 has 8 divisors (see below), whose sum is σ = 167208480. Its totient is φ = 155102640.

The previous prime is 161138399. The next prime is 161138477. The reversal of 161138413 is 314831161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161138413 - 2⁹ = 161137901 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 (161118413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1206 + ... + 17992.

It is an arithmetic number, because the mean of its divisors is an integer number (20901060).

Almost surely, 2^161138413 is an apocalyptic number.

It is an amenable number.

161138413 is a deficient number, since it is larger than the sum of its proper divisors (6070067).

161138413 is a wasteful number, since it uses less digits than its factorization.

161138413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17147.

The product of its digits is 1728, while the sum is 28.

The square root of 161138413 is about 12694.0306049733. The cubic root of 161138413 is about 544.1680351094.

Adding to 161138413 its reverse (314831161), we get a palindrome (475969574).

The spelling of 161138413 in words is "one hundred sixty-one million, one hundred thirty-eight thousand, four hundred thirteen".