147161813 has 4 divisors (see below), whose sum is σ = 147511788. Its totient is φ = 146811840.

The previous prime is 147161801. The next prime is 147161837. The reversal of 147161813 is 318161741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 318161741 = 9209 ⋅34549.

It can be written as a sum of positive squares in 2 ways, for example, as 17247409 + 129914404 = 4153^2 + 11398^2 .

It is a cyclic number.

It is not a de Polignac number, because 147161813 - 2²⁰ = 146113237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 147161813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147161873) 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, 174356 + ... + 175197.

It is an arithmetic number, because the mean of its divisors is an integer number (36877947).

Almost surely, 2^147161813 is an apocalyptic number.

It is an amenable number.

147161813 is a deficient number, since it is larger than the sum of its proper divisors (349975).

147161813 is an equidigital number, since it uses as much as digits as its factorization.

147161813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349974.

The product of its digits is 4032, while the sum is 32.

The square root of 147161813 is about 12131.0268732700. The cubic root of 147161813 is about 527.9567861882.

The spelling of 147161813 in words is "one hundred forty-seven million, one hundred sixty-one thousand, eight hundred thirteen".