1219315823 has 16 divisors (see below), whose sum is σ = 1402736640. Its totient is φ = 1048204800.

The previous prime is 1219315819. The next prime is 1219315831. The reversal of 1219315823 is 3285139121.

It is a cyclic number.

It is not a de Polignac number, because 1219315823 - 2² = 1219315819 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212315823) 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, 115538 + ... + 125648.

It is an arithmetic number, because the mean of its divisors is an integer number (87671040).

Almost surely, 2^1219315823 is an apocalyptic number.

1219315823 is a deficient number, since it is larger than the sum of its proper divisors (183420817).

1219315823 is a wasteful number, since it uses less digits than its factorization.

1219315823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10718.

The product of its digits is 12960, while the sum is 35.

The square root of 1219315823 is about 34918.7030543805. The cubic root of 1219315823 is about 1068.3299486822.

The spelling of 1219315823 in words is "one billion, two hundred nineteen million, three hundred fifteen thousand, eight hundred twenty-three".