923225509 has 2 divisors, whose sum is σ = 923225510. Its totient is φ = 923225508.

The previous prime is 923225503. The next prime is 923225551. The reversal of 923225509 is 905522329.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 903002500 + 20223009 = 30050^2 + 4497^2 .

It is an emirp because it is prime and its reverse (905522329) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 923225509 - 2²⁷ = 789007781 is a prime.

It is equal to p_47135755 and since 923225509 and 47135755 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (923225503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 461612754 + 461612755.

It is an arithmetic number, because the mean of its divisors is an integer number (461612755).

Almost surely, 2^923225509 is an apocalyptic number.

It is an amenable number.

923225509 is a deficient number, since it is larger than the sum of its proper divisors (1).

923225509 is an equidigital number, since it uses as much as digits as its factorization.

923225509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 923225509 is about 30384.6261948374. The cubic root of 923225509 is about 973.7241287304.

The spelling of 923225509 in words is "nine hundred twenty-three million, two hundred twenty-five thousand, five hundred nine".