845929549 has 2 divisors, whose sum is σ = 845929550. Its totient is φ = 845929548.

The previous prime is 845929543. The next prime is 845929561. The reversal of 845929549 is 945929548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 824723524 + 21206025 = 28718^2 + 4605^2 .

It is a cyclic number.

It is not a de Polignac number, because 845929549 - 2¹¹ = 845927501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 845929549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (845929543) 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, 422964774 + 422964775.

It is an arithmetic number, because the mean of its divisors is an integer number (422964775).

Almost surely, 2^845929549 is an apocalyptic number.

It is an amenable number.

845929549 is a deficient number, since it is larger than the sum of its proper divisors (1).

845929549 is an equidigital number, since it uses as much as digits as its factorization.

845929549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4665600, while the sum is 55.

The square root of 845929549 is about 29084.8680416467. The cubic root of 845929549 is about 945.7537351366.

Subtracting 845929549 from its reverse (945929548), we obtain a palindrome (99999999).

The spelling of 845929549 in words is "eight hundred forty-five million, nine hundred twenty-nine thousand, five hundred forty-nine".