1375455409 has 2 divisors, whose sum is σ = 1375455410. Its totient is φ = 1375455408.

The previous prime is 1375455401. The next prime is 1375455437. The reversal of 1375455409 is 9045545731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 869070400 + 506385009 = 29480^2 + 22503^2 .

It is a cyclic number.

It is not a de Polignac number, because 1375455409 - 2³ = 1375455401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1375455401) 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, 687727704 + 687727705.

It is an arithmetic number, because the mean of its divisors is an integer number (687727705).

Almost surely, 2^1375455409 is an apocalyptic number.

It is an amenable number.

1375455409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1375455409 is an equidigital number, since it uses as much as digits as its factorization.

1375455409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378000, while the sum is 43.

The square root of 1375455409 is about 37087.1326608030. The cubic root of 1375455409 is about 1112.1127978607.

The spelling of 1375455409 in words is "one billion, three hundred seventy-five million, four hundred fifty-five thousand, four hundred nine".