147161881 has 8 divisors (see below), whose sum is σ = 148920200. Its totient is φ = 145411200.

The previous prime is 147161879. The next prime is 147161891. The reversal of 147161881 is 188161741.

It can be written as a sum of positive squares in 4 ways, for example, as 44342281 + 102819600 = 6659^2 + 10140^2 .

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 147161881 - 2¹ = 147161879 is a prime.

It is a super-2 number, since 2×147161881² = 43313238438916322, which contains 22 as substring.

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 147161881.

It is not an unprimeable number, because it can be changed into a prime (147161801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42931 + ... + 46231.

It is an arithmetic number, because the mean of its divisors is an integer number (18615025).

Almost surely, 2^147161881 is an apocalyptic number.

It is an amenable number.

147161881 is a deficient number, since it is larger than the sum of its proper divisors (1758319).

147161881 is a wasteful number, since it uses less digits than its factorization.

147161881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3819.

The product of its digits is 10752, while the sum is 37.

The square root of 147161881 is about 12131.0296760003. The cubic root of 147161881 is about 527.9568675070.

The spelling of 147161881 in words is "one hundred forty-seven million, one hundred sixty-one thousand, eight hundred eighty-one".