87513381523 has 2 divisors, whose sum is σ = 87513381524. Its totient is φ = 87513381522.

The previous prime is 87513381521. The next prime is 87513381583. The reversal of 87513381523 is 32518331578.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87513381523 - 2¹ = 87513381521 is a prime.

Together with 87513381521, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (87513381521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43756690761 + 43756690762.

It is an arithmetic number, because the mean of its divisors is an integer number (43756690762).

Almost surely, 2^87513381523 is an apocalyptic number.

87513381523 is a deficient number, since it is larger than the sum of its proper divisors (1).

87513381523 is an equidigital number, since it uses as much as digits as its factorization.

87513381523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 604800, while the sum is 46.

The spelling of 87513381523 in words is "eighty-seven billion, five hundred thirteen million, three hundred eighty-one thousand, five hundred twenty-three".