1521787494923 has 2 divisors, whose sum is σ = 1521787494924. Its totient is φ = 1521787494922.

The previous prime is 1521787494881. The next prime is 1521787494947. The reversal of 1521787494923 is 3294947871251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1521787494923 - 2³⁰ = 1520713753099 is a prime.

It is not a weakly prime, because it can be changed into another prime (1521787493923) 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, 760893747461 + 760893747462.

It is an arithmetic number, because the mean of its divisors is an integer number (760893747462).

Almost surely, 2^{1521787494923} is an apocalyptic number.

1521787494923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521787494923 is an equidigital number, since it uses as much as digits as its factorization.

1521787494923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30481920, while the sum is 62.

The spelling of 1521787494923 in words is "one trillion, five hundred twenty-one billion, seven hundred eighty-seven million, four hundred ninety-four thousand, nine hundred twenty-three".