1219391313 has 12 divisors (see below), whose sum is σ = 1891301040. Its totient is φ = 696794952.

The previous prime is 1219391311. The next prime is 1219391321. The reversal of 1219391313 is 3131939121.

It is not a de Polignac number, because 1219391313 - 2¹ = 1219391311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1219391311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4147443 + ... + 4147736.

It is an arithmetic number, because the mean of its divisors is an integer number (157608420).

Almost surely, 2^1219391313 is an apocalyptic number.

It is an amenable number.

1219391313 is a deficient number, since it is larger than the sum of its proper divisors (671909727).

1219391313 is an equidigital number, since it uses as much as digits as its factorization.

1219391313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8295196 (or 8295189 counting only the distinct ones).

The product of its digits is 4374, while the sum is 33.

The square root of 1219391313 is about 34919.7839769950. The cubic root of 1219391313 is about 1068.3519956263.

The spelling of 1219391313 in words is "one billion, two hundred nineteen million, three hundred ninety-one thousand, three hundred thirteen".