331047149 has 2 divisors, whose sum is σ = 331047150. Its totient is φ = 331047148.

The previous prime is 331047139. The next prime is 331047181. The reversal of 331047149 is 941740133.

It is an a-pointer prime, because the next prime (331047181) can be obtained adding 331047149 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 322741225 + 8305924 = 17965^2 + 2882^2 .

It is an emirp because it is prime and its reverse (941740133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331047149 - 2²⁰ = 329998573 is a prime.

It is a super-2 number, since 2×331047149² = 219184429722056402, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331047139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165523574 + 165523575.

It is an arithmetic number, because the mean of its divisors is an integer number (165523575).

Almost surely, 2^331047149 is an apocalyptic number.

It is an amenable number.

331047149 is a deficient number, since it is larger than the sum of its proper divisors (1).

331047149 is an equidigital number, since it uses as much as digits as its factorization.

331047149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 331047149 is about 18194.7011242284. The cubic root of 331047149 is about 691.7724848471.

The spelling of 331047149 in words is "three hundred thirty-one million, forty-seven thousand, one hundred forty-nine".