845671369 has 2 divisors, whose sum is σ = 845671370. Its totient is φ = 845671368.

The previous prime is 845671357. The next prime is 845671373. The reversal of 845671369 is 963176548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 558707769 + 286963600 = 23637^2 + 16940^2 .

It is a cyclic number.

It is not a de Polignac number, because 845671369 - 2⁷ = 845671241 is a prime.

It is a super-2 number, since 2×845671369² = 1430320128692668322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (845671319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422835684 + 422835685.

It is an arithmetic number, because the mean of its divisors is an integer number (422835685).

Almost surely, 2^845671369 is an apocalyptic number.

It is an amenable number.

845671369 is a deficient number, since it is larger than the sum of its proper divisors (1).

845671369 is an equidigital number, since it uses as much as digits as its factorization.

845671369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 49.

The square root of 845671369 is about 29080.4293125119. The cubic root of 845671369 is about 945.6575098088.

The spelling of 845671369 in words is "eight hundred forty-five million, six hundred seventy-one thousand, three hundred sixty-nine".