531968149 has 2 divisors, whose sum is σ = 531968150. Its totient is φ = 531968148.

The previous prime is 531968147. The next prime is 531968159. The reversal of 531968149 is 941869135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 346518225 + 185449924 = 18615^2 + 13618^2 .

It is a cyclic number.

It is not a de Polignac number, because 531968149 - 2¹ = 531968147 is a prime.

It is a super-2 number, since 2×531968149² = 565980223100972402, which contains 22 as substring.

Together with 531968147, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 531968099 and 531968108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531968147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265984074 + 265984075.

It is an arithmetic number, because the mean of its divisors is an integer number (265984075).

Almost surely, 2^531968149 is an apocalyptic number.

It is an amenable number.

531968149 is a deficient number, since it is larger than the sum of its proper divisors (1).

531968149 is an equidigital number, since it uses as much as digits as its factorization.

531968149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 46.

The square root of 531968149 is about 23064.4347210158. The cubic root of 531968149 is about 810.2677309347.

The spelling of 531968149 in words is "five hundred thirty-one million, nine hundred sixty-eight thousand, one hundred forty-nine".