523103391 has 12 divisors (see below), whose sum is σ = 756314520. Its totient is φ = 348402960.

The previous prime is 523103377. The next prime is 523103423. The reversal of 523103391 is 193301325.

It is a happy number.

523103391 is a `hidden beast` number, since 523 + 103 + 39 + 1 = 666.

It is not a de Polignac number, because 523103391 - 2¹⁰ = 523102367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523103291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17565 + ... + 36806.

It is an arithmetic number, because the mean of its divisors is an integer number (63026210).

Almost surely, 2^523103391 is an apocalyptic number.

523103391 is a deficient number, since it is larger than the sum of its proper divisors (233211129).

523103391 is a wasteful number, since it uses less digits than its factorization.

523103391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55446 (or 55443 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 27.

The square root of 523103391 is about 22871.4536267374. The cubic root of 523103391 is about 805.7417085371.

The spelling of 523103391 in words is "five hundred twenty-three million, one hundred three thousand, three hundred ninety-one".