1383521009 has 16 divisors (see below), whose sum is σ = 1544262720. Its totient is φ = 1230707520.

The previous prime is 1383520987. The next prime is 1383521011. The reversal of 1383521009 is 9001253831.

It is a cyclic number.

It is not a de Polignac number, because 1383521009 - 2²⁴ = 1366743793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1383521059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212054 + ... + 218480.

It is an arithmetic number, because the mean of its divisors is an integer number (96516420).

Almost surely, 2^1383521009 is an apocalyptic number.

It is an amenable number.

1383521009 is a deficient number, since it is larger than the sum of its proper divisors (160741711).

1383521009 is a wasteful number, since it uses less digits than its factorization.

1383521009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7040.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1383521009 is about 37195.7122394504. The cubic root of 1383521009 is about 1114.2823534595.

The spelling of 1383521009 in words is "one billion, three hundred eighty-three million, five hundred twenty-one thousand, nine".