1340784871 has 2 divisors, whose sum is σ = 1340784872. Its totient is φ = 1340784870.

The previous prime is 1340784859. The next prime is 1340784901. The reversal of 1340784871 is 1784870431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1340784871 - 2⁷ = 1340784743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340784821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670392435 + 670392436.

It is an arithmetic number, because the mean of its divisors is an integer number (670392436).

Almost surely, 2^1340784871 is an apocalyptic number.

1340784871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340784871 is an equidigital number, since it uses as much as digits as its factorization.

1340784871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 1340784871 is about 36616.7293869892. The cubic root of 1340784871 is about 1102.6889781174.

The spelling of 1340784871 in words is "one billion, three hundred forty million, seven hundred eighty-four thousand, eight hundred seventy-one".