1427381999 has 16 divisors (see below), whose sum is σ = 1527338592. Its totient is φ = 1329282048.

The previous prime is 1427381971. The next prime is 1427382013. The reversal of 1427381999 is 9991837241.

It is a cyclic number.

It is not a de Polignac number, because 1427381999 - 2²⁸ = 1158946543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1427381999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427381699) 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 in 15 ways as a sum of consecutive naturals, for example, 684212 + ... + 686294.

It is an arithmetic number, because the mean of its divisors is an integer number (95458662).

Almost surely, 2^1427381999 is an apocalyptic number.

1427381999 is a deficient number, since it is larger than the sum of its proper divisors (99956593).

1427381999 is a wasteful number, since it uses less digits than its factorization.

1427381999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2506.

The product of its digits is 979776, while the sum is 53.

The square root of 1427381999 is about 37780.7093501432. The cubic root of 1427381999 is about 1125.9352220631.

The spelling of 1427381999 in words is "one billion, four hundred twenty-seven million, three hundred eighty-one thousand, nine hundred ninety-nine".