1408747409 has 2 divisors, whose sum is σ = 1408747410. Its totient is φ = 1408747408.

The previous prime is 1408747399. The next prime is 1408747411. The reversal of 1408747409 is 9047478041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 938074384 + 470673025 = 30628^2 + 21695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1408747409 is a prime.

Together with 1408747411, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1408747409.

It is not a weakly prime, because it can be changed into another prime (1408747709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 704373704 + 704373705.

It is an arithmetic number, because the mean of its divisors is an integer number (704373705).

Almost surely, 2^1408747409 is an apocalyptic number.

It is an amenable number.

1408747409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1408747409 is an equidigital number, since it uses as much as digits as its factorization.

1408747409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 1408747409 is about 37533.2840156574. The cubic root of 1408747409 is about 1121.0140181482.

The spelling of 1408747409 in words is "one billion, four hundred eight million, seven hundred forty-seven thousand, four hundred nine".