1443654709 has 6 divisors (see below), whose sum is σ = 1679353494. Its totient is φ = 1237418280.

The previous prime is 1443654689. The next prime is 1443654743. The reversal of 1443654709 is 9074563441.

It can be written as a sum of positive squares in only one way, i.e., 1190940100 + 252714609 = 34510^2 + 15897^2 .

It is not a de Polignac number, because 1443654709 - 2¹³ = 1443646517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1443654799) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14731122 + ... + 14731219.

It is an arithmetic number, because the mean of its divisors is an integer number (279892249).

Almost surely, 2^1443654709 is an apocalyptic number.

It is an amenable number.

1443654709 is a deficient number, since it is larger than the sum of its proper divisors (235698785).

1443654709 is an equidigital number, since it uses as much as digits as its factorization.

1443654709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29462355 (or 29462348 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 1443654709 is about 37995.4564257360. The cubic root of 1443654709 is about 1130.1977644834.

The spelling of 1443654709 in words is "one billion, four hundred forty-three million, six hundred fifty-four thousand, seven hundred nine".