1379432509 has 32 divisors (see below), whose sum is σ = 1809920000. Its totient is φ = 1020786624.

The previous prime is 1379432507. The next prime is 1379432543. The reversal of 1379432509 is 9052349731.

It is not a de Polignac number, because 1379432509 - 2¹ = 1379432507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1379432503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131542 + ... + 141640.

It is an arithmetic number, because the mean of its divisors is an integer number (56560000).

Almost surely, 2^1379432509 is an apocalyptic number.

1379432509 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1379432509 is a deficient number, since it is larger than the sum of its proper divisors (430487491).

1379432509 is a wasteful number, since it uses less digits than its factorization.

1379432509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10217.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 1379432509 is about 37140.7122844999. The cubic root of 1379432509 is about 1113.1836498918.

The spelling of 1379432509 in words is "one billion, three hundred seventy-nine million, four hundred thirty-two thousand, five hundred nine".