523145939 has 2 divisors, whose sum is σ = 523145940. Its totient is φ = 523145938.

The previous prime is 523145921. The next prime is 523145941. The reversal of 523145939 is 939541325.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 523145939 - 2⁸ = 523145683 is a prime.

Together with 523145941, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 523145896 and 523145905.

It is not a weakly prime, because it can be changed into another prime (523145989) 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, 261572969 + 261572970.

It is an arithmetic number, because the mean of its divisors is an integer number (261572970).

Almost surely, 2^523145939 is an apocalyptic number.

523145939 is a deficient number, since it is larger than the sum of its proper divisors (1).

523145939 is an equidigital number, since it uses as much as digits as its factorization.

523145939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 41.

The square root of 523145939 is about 22872.3837629575. The cubic root of 523145939 is about 805.7635536569.

The spelling of 523145939 in words is "five hundred twenty-three million, one hundred forty-five thousand, nine hundred thirty-nine".