1603761613 has 2 divisors, whose sum is σ = 1603761614. Its totient is φ = 1603761612.

The previous prime is 1603761611. The next prime is 1603761631. The reversal of 1603761613 is 3161673061.

1603761613 = 28317² + 28318².

Together with next prime (1603761631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 801909124 + 801852489 = 28318^2 + 28317^2 .

It is a cyclic number.

It is not a de Polignac number, because 1603761613 - 2¹ = 1603761611 is a prime.

It is a super-2 number, since 2×1603761613² = 5144102622664723538, which contains 22 as substring.

Together with 1603761611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1603761611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 801880806 + 801880807.

It is an arithmetic number, because the mean of its divisors is an integer number (801880807).

Almost surely, 2^1603761613 is an apocalyptic number.

1603761613 is the 28318-th centered square number.

It is an amenable number.

1603761613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1603761613 is an equidigital number, since it uses as much as digits as its factorization.

1603761613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 1603761613 is about 40046.9925587428. The cubic root of 1603761613 is about 1170.5229631834.

The spelling of 1603761613 in words is "one billion, six hundred three million, seven hundred sixty-one thousand, six hundred thirteen".