1214402009 has 2 divisors, whose sum is σ = 1214402010. Its totient is φ = 1214402008.

The previous prime is 1214401973. The next prime is 1214402011. The reversal of 1214402009 is 9002044121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 946915984 + 267486025 = 30772^2 + 16355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1214402009 is a prime.

Together with 1214402011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1214402039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607201004 + 607201005.

It is an arithmetic number, because the mean of its divisors is an integer number (607201005).

Almost surely, 2^1214402009 is an apocalyptic number.

It is an amenable number.

1214402009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214402009 is an equidigital number, since it uses as much as digits as its factorization.

1214402009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1214402009 is about 34848.2712483704. The cubic root of 1214402009 is about 1066.8929016985.

The spelling of 1214402009 in words is "one billion, two hundred fourteen million, four hundred two thousand, nine".