1213993269 has 12 divisors (see below), whose sum is σ = 1782293292. Its totient is φ = 796060800.

The previous prime is 1213993259. The next prime is 1213993279. The reversal of 1213993269 is 9623993121.

It is an interprime number because it is at equal distance from previous prime (1213993259) and next prime (1213993279).

It can be written as a sum of positive squares in 2 ways, for example, as 639432369 + 574560900 = 25287^2 + 23970^2 .

It is not a de Polignac number, because 1213993269 - 2²⁵ = 1180438837 is a prime.

It is a super-2 number, since 2×1213993269² = 2947559314354612722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213993229) 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, 1105092 + ... + 1106189.

It is an arithmetic number, because the mean of its divisors is an integer number (148524441).

Almost surely, 2^1213993269 is an apocalyptic number.

It is an amenable number.

1213993269 is a deficient number, since it is larger than the sum of its proper divisors (568300023).

1213993269 is a wasteful number, since it uses less digits than its factorization.

1213993269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211348 (or 2211345 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 1213993269 is about 34842.4061884365. The cubic root of 1213993269 is about 1066.7731909999.

The spelling of 1213993269 in words is "one billion, two hundred thirteen million, nine hundred ninety-three thousand, two hundred sixty-nine".