1231335403 has 2 divisors, whose sum is σ = 1231335404. Its totient is φ = 1231335402.

The previous prime is 1231335397. The next prime is 1231335419. The reversal of 1231335403 is 3045331321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231335403 - 2²⁵ = 1197780971 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231335433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615667701 + 615667702.

It is an arithmetic number, because the mean of its divisors is an integer number (615667702).

Almost surely, 2^1231335403 is an apocalyptic number.

1231335403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231335403 is an equidigital number, since it uses as much as digits as its factorization.

1231335403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 1231335403 is about 35090.3890403056. The cubic root of 1231335403 is about 1071.8288817212.

Adding to 1231335403 its reverse (3045331321), we get a palindrome (4276666724).

The spelling of 1231335403 in words is "one billion, two hundred thirty-one million, three hundred thirty-five thousand, four hundred three".