1340008591 has 2 divisors, whose sum is σ = 1340008592. Its totient is φ = 1340008590.

The previous prime is 1340008567. The next prime is 1340008601. The reversal of 1340008591 is 1958000431.

It is a strong prime.

It is an emirp because it is prime and its reverse (1958000431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1340008591 - 2⁵ = 1340008559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340008291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670004295 + 670004296.

It is an arithmetic number, because the mean of its divisors is an integer number (670004296).

Almost surely, 2^1340008591 is an apocalyptic number.

1340008591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340008591 is an equidigital number, since it uses as much as digits as its factorization.

1340008591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1340008591 is about 36606.1277793760. The cubic root of 1340008591 is about 1102.4761275025.

The spelling of 1340008591 in words is "one billion, three hundred forty million, eight thousand, five hundred ninety-one".