1403721313 has 2 divisors, whose sum is σ = 1403721314. Its totient is φ = 1403721312.

The previous prime is 1403721301. The next prime is 1403721343. The reversal of 1403721313 is 3131273041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1340804689 + 62916624 = 36617^2 + 7932^2 .

It is a cyclic number.

It is not a de Polignac number, because 1403721313 - 2¹³ = 1403713121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1403721343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701860656 + 701860657.

It is an arithmetic number, because the mean of its divisors is an integer number (701860657).

Almost surely, 2^1403721313 is an apocalyptic number.

It is an amenable number.

1403721313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1403721313 is an equidigital number, since it uses as much as digits as its factorization.

1403721313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 1403721313 is about 37466.2690029312. The cubic root of 1403721313 is about 1119.6792536570.

Adding to 1403721313 its reverse (3131273041), we get a palindrome (4534994354).

The spelling of 1403721313 in words is "one billion, four hundred three million, seven hundred twenty-one thousand, three hundred thirteen".