1340144191 has 2 divisors, whose sum is σ = 1340144192. Its totient is φ = 1340144190.

The previous prime is 1340144171. The next prime is 1340144237. The reversal of 1340144191 is 1914410431.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340144191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340144171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670072095 + 670072096.

It is an arithmetic number, because the mean of its divisors is an integer number (670072096).

Almost surely, 2^1340144191 is an apocalyptic number.

1340144191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340144191 is an equidigital number, since it uses as much as digits as its factorization.

1340144191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1340144191 is about 36607.9798814412. The cubic root of 1340144191 is about 1102.5133140104.

The spelling of 1340144191 in words is "one billion, three hundred forty million, one hundred forty-four thousand, one hundred ninety-one".