1340432369 has 2 divisors, whose sum is σ = 1340432370. Its totient is φ = 1340432368.

The previous prime is 1340432333. The next prime is 1340432383. The reversal of 1340432369 is 9632340431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1246090000 + 94342369 = 35300^2 + 9713^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340432369 - 2¹² = 1340428273 is a prime.

It is a super-2 number, since 2×1340432369² = 3593517871725904322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1340432399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670216184 + 670216185.

It is an arithmetic number, because the mean of its divisors is an integer number (670216185).

Almost surely, 2^1340432369 is an apocalyptic number.

It is an amenable number.

1340432369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340432369 is an equidigital number, since it uses as much as digits as its factorization.

1340432369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 35.

The square root of 1340432369 is about 36611.9156696287. The cubic root of 1340432369 is about 1102.5923346892.

The spelling of 1340432369 in words is "one billion, three hundred forty million, four hundred thirty-two thousand, three hundred sixty-nine".