1321524899 has 2 divisors, whose sum is σ = 1321524900. Its totient is φ = 1321524898.

The previous prime is 1321524871. The next prime is 1321524929. The reversal of 1321524899 is 9984251231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321524899 - 2⁸ = 1321524643 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321524859) 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, 660762449 + 660762450.

It is an arithmetic number, because the mean of its divisors is an integer number (660762450).

Almost surely, 2^1321524899 is an apocalyptic number.

1321524899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321524899 is an equidigital number, since it uses as much as digits as its factorization.

1321524899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The square root of 1321524899 is about 36352.7839236557. The cubic root of 1321524899 is about 1097.3835608606.

The spelling of 1321524899 in words is "one billion, three hundred twenty-one million, five hundred twenty-four thousand, eight hundred ninety-nine".