1384040999 has 4 divisors (see below), whose sum is σ = 1509862920. Its totient is φ = 1258219080.

The previous prime is 1384040989. The next prime is 1384041013. The reversal of 1384040999 is 9990404831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1384040999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1384040929) 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 in 3 ways as a sum of consecutive naturals, for example, 62910944 + ... + 62910965.

It is an arithmetic number, because the mean of its divisors is an integer number (377465730).

Almost surely, 2^1384040999 is an apocalyptic number.

1384040999 is a deficient number, since it is larger than the sum of its proper divisors (125821921).

1384040999 is a wasteful number, since it uses less digits than its factorization.

1384040999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125821920.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 1384040999 is about 37202.7015013695. The cubic root of 1384040999 is about 1114.4219352710.

The spelling of 1384040999 in words is "one billion, three hundred eighty-four million, forty thousand, nine hundred ninety-nine".