1405310909 has 4 divisors (see below), whose sum is σ = 1405581216. Its totient is φ = 1405040604.

The previous prime is 1405310903. The next prime is 1405310917. The reversal of 1405310909 is 9090135041.

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 a cyclic number.

It is not a de Polignac number, because 1405310909 - 2¹² = 1405306813 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 (1405310903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127199 + ... + 137804.

It is an arithmetic number, because the mean of its divisors is an integer number (351395304).

Almost surely, 2^1405310909 is an apocalyptic number.

It is an amenable number.

1405310909 is a deficient number, since it is larger than the sum of its proper divisors (270307).

1405310909 is an equidigital number, since it uses as much as digits as its factorization.

1405310909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270306.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 1405310909 is about 37487.4766955579. The cubic root of 1405310909 is about 1120.1017416609.

The spelling of 1405310909 in words is "one billion, four hundred five million, three hundred ten thousand, nine hundred nine".