147172549 has 2 divisors, whose sum is σ = 147172550. Its totient is φ = 147172548.

The previous prime is 147172523. The next prime is 147172559. The reversal of 147172549 is 945271741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122102500 + 25070049 = 11050^2 + 5007^2 .

It is a cyclic number.

It is not a de Polignac number, because 147172549 - 2⁵ = 147172517 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 (147172559) 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, 73586274 + 73586275.

It is an arithmetic number, because the mean of its divisors is an integer number (73586275).

Almost surely, 2^147172549 is an apocalyptic number.

It is an amenable number.

147172549 is a deficient number, since it is larger than the sum of its proper divisors (1).

147172549 is an equidigital number, since it uses as much as digits as its factorization.

147172549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 40.

The square root of 147172549 is about 12131.4693668986. The cubic root of 147172549 is about 527.9696246778.

The spelling of 147172549 in words is "one hundred forty-seven million, one hundred seventy-two thousand, five hundred forty-nine".