1379145409 has 2 divisors, whose sum is σ = 1379145410. Its totient is φ = 1379145408.

The previous prime is 1379145403. The next prime is 1379145461. The reversal of 1379145409 is 9045419731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1320959025 + 58186384 = 36345^2 + 7628^2 .

It is a cyclic number.

It is not a de Polignac number, because 1379145409 - 2¹¹ = 1379143361 is a prime.

It is not a weakly prime, because it can be changed into another prime (1379145403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689572704 + 689572705.

It is an arithmetic number, because the mean of its divisors is an integer number (689572705).

Almost surely, 2^1379145409 is an apocalyptic number.

It is an amenable number.

1379145409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1379145409 is an equidigital number, since it uses as much as digits as its factorization.

1379145409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1379145409 is about 37136.8470524895. The cubic root of 1379145409 is about 1113.1064159088.

The spelling of 1379145409 in words is "one billion, three hundred seventy-nine million, one hundred forty-five thousand, four hundred nine".