147205517 has 2 divisors, whose sum is σ = 147205518. Its totient is φ = 147205516.

The previous prime is 147205493. The next prime is 147205523. The reversal of 147205517 is 715502741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118679236 + 28526281 = 10894^2 + 5341^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147205517 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147205117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73602758 + 73602759.

It is an arithmetic number, because the mean of its divisors is an integer number (73602759).

Almost surely, 2^147205517 is an apocalyptic number.

It is an amenable number.

147205517 is a deficient number, since it is larger than the sum of its proper divisors (1).

147205517 is an equidigital number, since it uses as much as digits as its factorization.

147205517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9800, while the sum is 32.

The square root of 147205517 is about 12132.8280709816. The cubic root of 147205517 is about 528.0090450796.

The spelling of 147205517 in words is "one hundred forty-seven million, two hundred five thousand, five hundred seventeen".