1375379509 has 16 divisors (see below), whose sum is σ = 1670288256. Its totient is φ = 1105574400.

The previous prime is 1375379501. The next prime is 1375379527. The reversal of 1375379509 is 9059735731.

It is a happy number.

It is not a de Polignac number, because 1375379509 - 2³ = 1375379501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375379501) 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, 12874 + ... + 54004.

It is an arithmetic number, because the mean of its divisors is an integer number (104393016).

Almost surely, 2^1375379509 is an apocalyptic number.

It is an amenable number.

1375379509 is a deficient number, since it is larger than the sum of its proper divisors (294908747).

1375379509 is a wasteful number, since it uses less digits than its factorization.

1375379509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41436.

The product of its (nonzero) digits is 893025, while the sum is 49.

The square root of 1375379509 is about 37086.1093807371. The cubic root of 1375379509 is about 1112.0923413841.

The spelling of 1375379509 in words is "one billion, three hundred seventy-five million, three hundred seventy-nine thousand, five hundred nine".