523036991 has 4 divisors (see below), whose sum is σ = 539909184. Its totient is φ = 506164800.

The previous prime is 523036973. The next prime is 523037017. The reversal of 523036991 is 199630325.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 523036991 - 2¹⁴ = 523020607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523036931) 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 in 3 ways as a sum of consecutive naturals, for example, 8436050 + ... + 8436111.

It is an arithmetic number, because the mean of its divisors is an integer number (134977296).

Almost surely, 2^523036991 is an apocalyptic number.

523036991 is a deficient number, since it is larger than the sum of its proper divisors (16872193).

523036991 is a wasteful number, since it uses less digits than its factorization.

523036991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16872192.

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 523036991 is about 22870.0019895058. The cubic root of 523036991 is about 805.7076148861.

The spelling of 523036991 in words is "five hundred twenty-three million, thirty-six thousand, nine hundred ninety-one".