1350280309 has 6 divisors (see below), whose sum is σ = 1570734294. Its totient is φ = 1157383080.

The previous prime is 1350280307. The next prime is 1350280319. The reversal of 1350280309 is 9030820531.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1012639684 + 337640625 = 31822^2 + 18375^2 .

It is not a de Polignac number, because 1350280309 - 2¹ = 1350280307 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 (1350280307) 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, 13778322 + ... + 13778419.

It is an arithmetic number, because the mean of its divisors is an integer number (261789049).

Almost surely, 2^1350280309 is an apocalyptic number.

It is an amenable number.

1350280309 is a deficient number, since it is larger than the sum of its proper divisors (220453985).

1350280309 is an equidigital number, since it uses as much as digits as its factorization.

1350280309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27556755 (or 27556748 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1350280309 is about 36746.1604660950. The cubic root of 1350280309 is about 1105.2859381640.

The spelling of 1350280309 in words is "one billion, three hundred fifty million, two hundred eighty thousand, three hundred nine".