1213872832369 has 8 divisors (see below), whose sum is σ = 1306347234408. Its totient is φ = 1123739554560.

The previous prime is 1213872832349. The next prime is 1213872832399. The reversal of 1213872832369 is 9632382783121.

It can be written as a sum of positive squares in 4 ways, for example, as 10376070769 + 1203496761600 = 101863^2 + 1097040^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213872832369 - 2¹¹ = 1213872830321 is a prime.

It is a super-2 number, since 2×1213872832369² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213872832349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 585279982 + ... + 585282055.

It is an arithmetic number, because the mean of its divisors is an integer number (163293404301).

Almost surely, 2^{1213872832369} is an apocalyptic number.

It is an amenable number.

1213872832369 is a deficient number, since it is larger than the sum of its proper divisors (92474402039).

1213872832369 is a wasteful number, since it uses less digits than its factorization.

1213872832369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170562115.

The product of its digits is 5225472, while the sum is 55.

The spelling of 1213872832369 in words is "one trillion, two hundred thirteen billion, eight hundred seventy-two million, eight hundred thirty-two thousand, three hundred sixty-nine".