523139389 has 8 divisors (see below), whose sum is σ = 530701952. Its totient is φ = 515587680.

The previous prime is 523139363. The next prime is 523139399. The reversal of 523139389 is 983931325.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 523139389 - 2⁷ = 523139261 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 (523139399) 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 7 ways as a sum of consecutive naturals, for example, 193642 + ... + 196324.

It is an arithmetic number, because the mean of its divisors is an integer number (66337744).

Almost surely, 2^523139389 is an apocalyptic number.

It is an amenable number.

523139389 is a deficient number, since it is larger than the sum of its proper divisors (7562563).

523139389 is a wasteful number, since it uses less digits than its factorization.

523139389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5427.

The product of its digits is 174960, while the sum is 43.

The square root of 523139389 is about 22872.2405767341. The cubic root of 523139389 is about 805.7601908137.

The spelling of 523139389 in words is "five hundred twenty-three million, one hundred thirty-nine thousand, three hundred eighty-nine".