845943149 has 2 divisors, whose sum is σ = 845943150. Its totient is φ = 845943148.

The previous prime is 845943127. The next prime is 845943167. The reversal of 845943149 is 941349548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 663423049 + 182520100 = 25757^2 + 13510^2 .

It is a cyclic number.

It is not a de Polignac number, because 845943149 - 2⁸ = 845942893 is a prime.

It is a super-2 number, since 2×845943149² = 1431239622680072402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (845943169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422971574 + 422971575.

It is an arithmetic number, because the mean of its divisors is an integer number (422971575).

Almost surely, 2^845943149 is an apocalyptic number.

It is an amenable number.

845943149 is a deficient number, since it is larger than the sum of its proper divisors (1).

845943149 is an equidigital number, since it uses as much as digits as its factorization.

845943149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 47.

The square root of 845943149 is about 29085.1018392578. The cubic root of 845943149 is about 945.7588034002.

The spelling of 845943149 in words is "eight hundred forty-five million, nine hundred forty-three thousand, one hundred forty-nine".