1331420999 has 2 divisors, whose sum is σ = 1331421000. Its totient is φ = 1331420998.

The previous prime is 1331420971. The next prime is 1331421037. The reversal of 1331420999 is 9990241331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1331420999 - 2⁸ = 1331420743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331420899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665710499 + 665710500.

It is an arithmetic number, because the mean of its divisors is an integer number (665710500).

Almost surely, 2^1331420999 is an apocalyptic number.

1331420999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331420999 is an equidigital number, since it uses as much as digits as its factorization.

1331420999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 1331420999 is about 36488.6420547545. The cubic root of 1331420999 is about 1100.1159654601.

The spelling of 1331420999 in words is "one billion, three hundred thirty-one million, four hundred twenty thousand, nine hundred ninety-nine".