1340741189 has 2 divisors, whose sum is σ = 1340741190. Its totient is φ = 1340741188.

The previous prime is 1340741183. The next prime is 1340741191. The reversal of 1340741189 is 9811470431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1074725089 + 266016100 = 32783^2 + 16310^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340741189 - 2⁴ = 1340741173 is a prime.

It is a super-2 number, since 2×1340741189² = 3595173871762267442, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1340741191, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340741183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670370594 + 670370595.

It is an arithmetic number, because the mean of its divisors is an integer number (670370595).

Almost surely, 2^1340741189 is an apocalyptic number.

It is an amenable number.

1340741189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340741189 is an equidigital number, since it uses as much as digits as its factorization.

1340741189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1340741189 is about 36616.1329061385. The cubic root of 1340741189 is about 1102.6770029964.

The spelling of 1340741189 in words is "one billion, three hundred forty million, seven hundred forty-one thousand, one hundred eighty-nine".