1243232269 has 2 divisors, whose sum is σ = 1243232270. Its totient is φ = 1243232268.

The previous prime is 1243232261. The next prime is 1243232279. The reversal of 1243232269 is 9622323421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1000963044 + 242269225 = 31638^2 + 15565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243232269 - 2³ = 1243232261 is a prime.

It is a super-2 number, since 2×1243232269² = 3091252949365776722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243232261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621616134 + 621616135.

It is an arithmetic number, because the mean of its divisors is an integer number (621616135).

Almost surely, 2^1243232269 is an apocalyptic number.

It is an amenable number.

1243232269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243232269 is an equidigital number, since it uses as much as digits as its factorization.

1243232269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 34.

The square root of 1243232269 is about 35259.4989896340. The cubic root of 1243232269 is about 1075.2697412881.

The spelling of 1243232269 in words is "one billion, two hundred forty-three million, two hundred thirty-two thousand, two hundred sixty-nine".