1340544587 has 2 divisors, whose sum is σ = 1340544588. Its totient is φ = 1340544586.

The previous prime is 1340544511. The next prime is 1340544599. The reversal of 1340544587 is 7854450431.

It is a strong prime.

It is an emirp because it is prime and its reverse (7854450431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1340544587 - 2¹⁰ = 1340543563 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340544787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670272293 + 670272294.

It is an arithmetic number, because the mean of its divisors is an integer number (670272294).

Almost surely, 2^1340544587 is an apocalyptic number.

1340544587 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340544587 is an equidigital number, since it uses as much as digits as its factorization.

1340544587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 268800, while the sum is 41.

The square root of 1340544587 is about 36613.4481714028. The cubic root of 1340544587 is about 1102.6231026854.

The spelling of 1340544587 in words is "one billion, three hundred forty million, five hundred forty-four thousand, five hundred eighty-seven".