1213369381 has 8 divisors (see below), whose sum is σ = 1390573440. Its totient is φ = 1037131728.

The previous prime is 1213369349. The next prime is 1213369387. The reversal of 1213369381 is 1839633121.

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 1213369381 - 2⁵ = 1213369349 is a prime.

It is a super-2 number, since 2×1213369381² = 2944530509496646322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213369381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213369387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238906 + ... + 243931.

It is an arithmetic number, because the mean of its divisors is an integer number (173821680).

Almost surely, 2^1213369381 is an apocalyptic number.

It is an amenable number.

1213369381 is a deficient number, since it is larger than the sum of its proper divisors (177204059).

1213369381 is an equidigital number, since it uses as much as digits as its factorization.

1213369381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483203.

The product of its digits is 23328, while the sum is 37.

The square root of 1213369381 is about 34833.4520396701. The cubic root of 1213369381 is about 1066.5904165004.

The spelling of 1213369381 in words is "one billion, two hundred thirteen million, three hundred sixty-nine thousand, three hundred eighty-one".