1213613008 has 20 divisors (see below), whose sum is σ = 2391230880. Its totient is φ = 596521184.

The previous prime is 1213613003. The next prime is 1213613039. The reversal of 1213613008 is 8003163121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213613003) 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, 641860 + ... + 643747.

It is an arithmetic number, because the mean of its divisors is an integer number (119561544).

Almost surely, 2^1213613008 is an apocalyptic number.

It is an amenable number.

1213613008 is a deficient number, since it is larger than the sum of its proper divisors (1177617872).

1213613008 is a wasteful number, since it uses less digits than its factorization.

1213613008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285674 (or 1285668 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1213613008 is about 34836.9488905099. The cubic root of 1213613008 is about 1066.6617970264.

Adding to 1213613008 its reverse (8003163121), we get a palindrome (9216776129).

The spelling of 1213613008 in words is "one billion, two hundred thirteen million, six hundred thirteen thousand, eight".