1213711603 has 4 divisors (see below), whose sum is σ = 1307074048. Its totient is φ = 1120349160.

The previous prime is 1213711589. The next prime is 1213711613. The reversal of 1213711603 is 3061173121.

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 1213711603 - 2¹³ = 1213703411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213711613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46681203 + ... + 46681228.

It is an arithmetic number, because the mean of its divisors is an integer number (326768512).

Almost surely, 2^1213711603 is an apocalyptic number.

1213711603 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1213711603 is a deficient number, since it is larger than the sum of its proper divisors (93362445).

1213711603 is an equidigital number, since it uses as much as digits as its factorization.

1213711603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93362444.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 1213711603 is about 34838.3639541239. The cubic root of 1213711603 is about 1066.6906817618.

Adding to 1213711603 its reverse (3061173121), we get a palindrome (4274884724).

The spelling of 1213711603 in words is "one billion, two hundred thirteen million, seven hundred eleven thousand, six hundred three".