1219860013 has 16 divisors (see below), whose sum is σ = 1273383936. Its totient is φ = 1167304320.

The previous prime is 1219860001. The next prime is 1219860023. The reversal of 1219860013 is 3100689121.

It is a cyclic number.

It is not a de Polignac number, because 1219860013 - 2⁵ = 1219859981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1219860023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1279545 + ... + 1280497.

It is an arithmetic number, because the mean of its divisors is an integer number (79586496).

Almost surely, 2^1219860013 is an apocalyptic number.

It is an amenable number.

1219860013 is a deficient number, since it is larger than the sum of its proper divisors (53523923).

1219860013 is a wasteful number, since it uses less digits than its factorization.

1219860013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1219860013 is about 34926.4944275832. The cubic root of 1219860013 is about 1068.4888596590.

The spelling of 1219860013 in words is "one billion, two hundred nineteen million, eight hundred sixty thousand, thirteen".