1324400999 has 2 divisors, whose sum is σ = 1324401000. Its totient is φ = 1324400998.

The previous prime is 1324400939. The next prime is 1324401007. The reversal of 1324400999 is 9990044231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1324400999 - 2¹² = 1324396903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1324400939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 662200499 + 662200500.

It is an arithmetic number, because the mean of its divisors is an integer number (662200500).

Almost surely, 2^1324400999 is an apocalyptic number.

1324400999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1324400999 is an equidigital number, since it uses as much as digits as its factorization.

1324400999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 1324400999 is about 36392.3206047650. The cubic root of 1324400999 is about 1098.1790807363.

The spelling of 1324400999 in words is "one billion, three hundred twenty-four million, four hundred thousand, nine hundred ninety-nine".