531949147 has 2 divisors, whose sum is σ = 531949148. Its totient is φ = 531949146.

The previous prime is 531949073. The next prime is 531949177. The reversal of 531949147 is 741949135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 531949147 - 2²³ = 523560539 is a prime.

It is not a weakly prime, because it can be changed into another prime (531949177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265974573 + 265974574.

It is an arithmetic number, because the mean of its divisors is an integer number (265974574).

Almost surely, 2^531949147 is an apocalyptic number.

531949147 is a deficient number, since it is larger than the sum of its proper divisors (1).

531949147 is an equidigital number, since it uses as much as digits as its factorization.

531949147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 43.

The square root of 531949147 is about 23064.0227844147. The cubic root of 531949147 is about 810.2580831824.

The spelling of 531949147 in words is "five hundred thirty-one million, nine hundred forty-nine thousand, one hundred forty-seven".