1403231309 has 4 divisors (see below), whose sum is σ = 1408297404. Its totient is φ = 1398165216.

The previous prime is 1403231287. The next prime is 1403231329. The reversal of 1403231309 is 9031323041.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9031323041 = 13 ⋅694717157.

It can be written as a sum of positive squares in 2 ways, for example, as 262278025 + 1140953284 = 16195^2 + 33778^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1403231309 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 (1403231329) 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, 2532632 + ... + 2533185.

It is an arithmetic number, because the mean of its divisors is an integer number (352074351).

Almost surely, 2^1403231309 is an apocalyptic number.

It is an amenable number.

1403231309 is a deficient number, since it is larger than the sum of its proper divisors (5066095).

1403231309 is an equidigital number, since it uses as much as digits as its factorization.

1403231309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5066094.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 1403231309 is about 37459.7291634630. The cubic root of 1403231309 is about 1119.5489544873.

The spelling of 1403231309 in words is "one billion, four hundred three million, two hundred thirty-one thousand, three hundred nine".