1350940809 has 4 divisors (see below), whose sum is σ = 1801254416. Its totient is φ = 900627204.

The previous prime is 1350940807. The next prime is 1350940813. The reversal of 1350940809 is 9080490531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1350940809 - 2¹ = 1350940807 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1350940807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225156799 + ... + 225156804.

It is an arithmetic number, because the mean of its divisors is an integer number (450313604).

Almost surely, 2^1350940809 is an apocalyptic number.

It is an amenable number.

1350940809 is a deficient number, since it is larger than the sum of its proper divisors (450313607).

1350940809 is an equidigital number, since it uses as much as digits as its factorization.

1350940809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450313606.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 1350940809 is about 36755.1467008363. The cubic root of 1350940809 is about 1105.4661284930.

The spelling of 1350940809 in words is "one billion, three hundred fifty million, nine hundred forty thousand, eight hundred nine".