1214020399 has 2 divisors, whose sum is σ = 1214020400. Its totient is φ = 1214020398.

The previous prime is 1214020391. The next prime is 1214020421. The reversal of 1214020399 is 9930204121.

It is a weak prime.

It is an emirp because it is prime and its reverse (9930204121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1214020399 - 2³ = 1214020391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1214020399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1214020391) 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, 607010199 + 607010200.

It is an arithmetic number, because the mean of its divisors is an integer number (607010200).

Almost surely, 2^1214020399 is an apocalyptic number.

1214020399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214020399 is an equidigital number, since it uses as much as digits as its factorization.

1214020399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 1214020399 is about 34842.7955106935. The cubic root of 1214020399 is about 1066.7811375956.

The spelling of 1214020399 in words is "one billion, two hundred fourteen million, twenty thousand, three hundred ninety-nine".