1445623409 has 2 divisors, whose sum is σ = 1445623410. Its totient is φ = 1445623408.

The previous prime is 1445623391. The next prime is 1445623427. The reversal of 1445623409 is 9043265441.

It is a balanced prime because it is at equal distance from previous prime (1445623391) and next prime (1445623427).

It can be written as a sum of positive squares in only one way, i.e., 1415866384 + 29757025 = 37628^2 + 5455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1445623409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1445623489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722811704 + 722811705.

It is an arithmetic number, because the mean of its divisors is an integer number (722811705).

Almost surely, 2^1445623409 is an apocalyptic number.

It is an amenable number.

1445623409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445623409 is an equidigital number, since it uses as much as digits as its factorization.

1445623409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 1445623409 is about 38021.3546444626. The cubic root of 1445623409 is about 1130.7112782474.

The spelling of 1445623409 in words is "one billion, four hundred forty-five million, six hundred twenty-three thousand, four hundred nine".