1613312303 has 4 divisors (see below), whose sum is σ = 1621419600. Its totient is φ = 1605205008.

The previous prime is 1613312293. The next prime is 1613312317. The reversal of 1613312303 is 3032133161.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1613312303 - 2¹⁴ = 1613295919 is a prime.

It is a super-2 number, since 2×1613312303² = 5205553174022327618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613312383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4053350 + ... + 4053747.

It is an arithmetic number, because the mean of its divisors is an integer number (405354900).

Almost surely, 2^1613312303 is an apocalyptic number.

1613312303 is a deficient number, since it is larger than the sum of its proper divisors (8107297).

1613312303 is an equidigital number, since it uses as much as digits as its factorization.

1613312303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8107296.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 1613312303 is about 40166.0590922236. The cubic root of 1613312303 is about 1172.8419245159.

Adding to 1613312303 its reverse (3032133161), we get a palindrome (4645445464).

The spelling of 1613312303 in words is "one billion, six hundred thirteen million, three hundred twelve thousand, three hundred three".