1031320403 has 2 divisors, whose sum is σ = 1031320404. Its totient is φ = 1031320402.

The previous prime is 1031320349. The next prime is 1031320427. The reversal of 1031320403 is 3040231301.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3040231301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1031320403 - 2²² = 1027126099 is a prime.

It is not a weakly prime, because it can be changed into another prime (1031340403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515660201 + 515660202.

It is an arithmetic number, because the mean of its divisors is an integer number (515660202).

Almost surely, 2^1031320403 is an apocalyptic number.

1031320403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031320403 is an equidigital number, since it uses as much as digits as its factorization.

1031320403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1031320403 is about 32114.1776011780. The cubic root of 1031320403 is about 1010.3329957775.

Adding to 1031320403 its reverse (3040231301), we get a palindrome (4071551704).

The spelling of 1031320403 in words is "one billion, thirty-one million, three hundred twenty thousand, four hundred three".