523649501 has 2 divisors, whose sum is σ = 523649502. Its totient is φ = 523649500.

The previous prime is 523649449. The next prime is 523649507. The reversal of 523649501 is 105946325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 473932900 + 49716601 = 21770^2 + 7051^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523649501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523649507) 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, 261824750 + 261824751.

It is an arithmetic number, because the mean of its divisors is an integer number (261824751).

Almost surely, 2^523649501 is an apocalyptic number.

It is an amenable number.

523649501 is a deficient number, since it is larger than the sum of its proper divisors (1).

523649501 is an equidigital number, since it uses as much as digits as its factorization.

523649501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 523649501 is about 22883.3891939109. The cubic root of 523649501 is about 806.0220040296.

The spelling of 523649501 in words is "five hundred twenty-three million, six hundred forty-nine thousand, five hundred one".