523403149 has 2 divisors, whose sum is σ = 523403150. Its totient is φ = 523403148.

The previous prime is 523403137. The next prime is 523403159. The reversal of 523403149 is 941304325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 496175625 + 27227524 = 22275^2 + 5218^2 .

It is a cyclic number.

It is not a de Polignac number, because 523403149 - 2⁵ = 523403117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 523403149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523403159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261701574 + 261701575.

It is an arithmetic number, because the mean of its divisors is an integer number (261701575).

Almost surely, 2^523403149 is an apocalyptic number.

It is an amenable number.

523403149 is a deficient number, since it is larger than the sum of its proper divisors (1).

523403149 is an equidigital number, since it uses as much as digits as its factorization.

523403149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 523403149 is about 22878.0057915894. The cubic root of 523403149 is about 805.8955859586.

The spelling of 523403149 in words is "five hundred twenty-three million, four hundred three thousand, one hundred forty-nine".