523119991 has 2 divisors, whose sum is σ = 523119992. Its totient is φ = 523119990.

The previous prime is 523119973. The next prime is 523120001. The reversal of 523119991 is 199911325.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 523119991 - 2⁹ = 523119479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523119941) 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 as a sum of consecutive naturals, namely, 261559995 + 261559996.

It is an arithmetic number, because the mean of its divisors is an integer number (261559996).

Almost surely, 2^523119991 is an apocalyptic number.

523119991 is a deficient number, since it is larger than the sum of its proper divisors (1).

523119991 is an equidigital number, since it uses as much as digits as its factorization.

523119991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21870, while the sum is 40.

The square root of 523119991 is about 22871.8165216495. The cubic root of 523119991 is about 805.7502314990.

The spelling of 523119991 in words is "five hundred twenty-three million, one hundred nineteen thousand, nine hundred ninety-one".