523768997 has 16 divisors (see below), whose sum is σ = 566807472. Its totient is φ = 482181120.

The previous prime is 523768981. The next prime is 523769011. The reversal of 523768997 is 799867325.

It is a Cunningham number, because it is equal to 22886²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 320356 + 523448641 = 566^2 + 22879^2 .

It is a cyclic number.

It is not a de Polignac number, because 523768997 - 2⁴ = 523768981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523768907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198833 + ... + 201449.

It is an arithmetic number, because the mean of its divisors is an integer number (35425467).

Almost surely, 2^523768997 is an apocalyptic number.

It is an amenable number.

523768997 is a deficient number, since it is larger than the sum of its proper divisors (43038475).

523768997 is a wasteful number, since it uses less digits than its factorization.

523768997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888.

The product of its digits is 5715360, while the sum is 56.

The square root of 523768997 is about 22886.0000218474. Note that the first 4 decimals coincide. The cubic root of 523768997 is about 806.0833103548.

The spelling of 523768997 in words is "five hundred twenty-three million, seven hundred sixty-eight thousand, nine hundred ninety-seven".