147973231 has 4 divisors (see below), whose sum is σ = 169112272. Its totient is φ = 126834192.

The previous prime is 147973213. The next prime is 147973247. The reversal of 147973231 is 132379741.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132379741 = 13 ⋅10183057.

It is a cyclic number.

It is not a de Polignac number, because 147973231 - 2⁷ = 147973103 is a prime.

It is a super-2 number, since 2×147973231² = 43792154185158722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147673231) 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, 10569510 + ... + 10569523.

It is an arithmetic number, because the mean of its divisors is an integer number (42278068).

Almost surely, 2^147973231 is an apocalyptic number.

147973231 is a deficient number, since it is larger than the sum of its proper divisors (21139041).

147973231 is an equidigital number, since it uses as much as digits as its factorization.

147973231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21139040.

The product of its digits is 31752, while the sum is 37.

The square root of 147973231 is about 12164.4248117204. The cubic root of 147973231 is about 528.9253542281.

The spelling of 147973231 in words is "one hundred forty-seven million, nine hundred seventy-three thousand, two hundred thirty-one".