1213646103 has 24 divisors (see below), whose sum is σ = 1771819920. Its totient is φ = 800459520.

The previous prime is 1213646101. The next prime is 1213646131. The reversal of 1213646103 is 3016463121.

1213646103 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 646 + 10 + 3 = 666.

It is not a de Polignac number, because 1213646103 - 2¹ = 1213646101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213646101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 986893 + ... + 988121.

It is an arithmetic number, because the mean of its divisors is an integer number (73825830).

Almost surely, 2^1213646103 is an apocalyptic number.

1213646103 is a deficient number, since it is larger than the sum of its proper divisors (558173817).

1213646103 is a wasteful number, since it uses less digits than its factorization.

1213646103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319 (or 2316 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1213646103 is about 34837.4238858157. The cubic root of 1213646103 is about 1066.6714928276.

The spelling of 1213646103 in words is "one billion, two hundred thirteen million, six hundred forty-six thousand, one hundred three".