845424497 has 2 divisors, whose sum is σ = 845424498. Its totient is φ = 845424496.

The previous prime is 845424493. The next prime is 845424509. The reversal of 845424497 is 794424548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 435807376 + 409617121 = 20876^2 + 20239^2 .

It is a cyclic number.

It is not a de Polignac number, because 845424497 - 2² = 845424493 is a prime.

It is not a weakly prime, because it can be changed into another prime (845424493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422712248 + 422712249.

It is an arithmetic number, because the mean of its divisors is an integer number (422712249).

Almost surely, 2^845424497 is an apocalyptic number.

It is an amenable number.

845424497 is a deficient number, since it is larger than the sum of its proper divisors (1).

845424497 is an equidigital number, since it uses as much as digits as its factorization.

845424497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1290240, while the sum is 47.

The square root of 845424497 is about 29076.1843610884. The cubic root of 845424497 is about 945.5654807259.

The spelling of 845424497 in words is "eight hundred forty-five million, four hundred twenty-four thousand, four hundred ninety-seven".