1340561817 has 24 divisors (see below), whose sum is σ = 2214463680. Its totient is φ = 765525600.

The previous prime is 1340561813. The next prime is 1340561821. The reversal of 1340561817 is 7181650431.

1340561817 is a `hidden beast` number, since 1 + 34 + 0 + 5 + 618 + 1 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (1340561813) and next prime (1340561821).

It is not a de Polignac number, because 1340561817 - 2² = 1340561813 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1340561813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101442 + ... + 113892.

It is an arithmetic number, because the mean of its divisors is an integer number (92269320).

Almost surely, 2^1340561817 is an apocalyptic number.

It is an amenable number.

1340561817 is a deficient number, since it is larger than the sum of its proper divisors (873901863).

1340561817 is a wasteful number, since it uses less digits than its factorization.

1340561817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14173 (or 14170 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 1340561817 is about 36613.6834667041. The cubic root of 1340561817 is about 1102.6278266647.

The spelling of 1340561817 in words is "one billion, three hundred forty million, five hundred sixty-one thousand, eight hundred seventeen".