1127402009 has 2 divisors, whose sum is σ = 1127402010. Its totient is φ = 1127402008.

The previous prime is 1127401981. The next prime is 1127402011. The reversal of 1127402009 is 9002047211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 722265625 + 405136384 = 26875^2 + 20128^2 .

It is a cyclic number.

It is not a de Polignac number, because 1127402009 - 2⁸ = 1127401753 is a prime.

Together with 1127402011, 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 (1127402609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 563701004 + 563701005.

It is an arithmetic number, because the mean of its divisors is an integer number (563701005).

Almost surely, 2^1127402009 is an apocalyptic number.

It is an amenable number.

1127402009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1127402009 is an equidigital number, since it uses as much as digits as its factorization.

1127402009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 1127402009 is about 33576.8076058460. The cubic root of 1127402009 is about 1040.7815897956.

The spelling of 1127402009 in words is "one billion, one hundred twenty-seven million, four hundred two thousand, nine".