1340346817 has 2 divisors, whose sum is σ = 1340346818. Its totient is φ = 1340346816.

The previous prime is 1340346803. The next prime is 1340346841. The reversal of 1340346817 is 7186430431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1180678321 + 159668496 = 34361^2 + 12636^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340346817 - 2¹⁵ = 1340314049 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340346617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670173408 + 670173409.

It is an arithmetic number, because the mean of its divisors is an integer number (670173409).

Almost surely, 2^1340346817 is an apocalyptic number.

It is an amenable number.

1340346817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340346817 is an equidigital number, since it uses as much as digits as its factorization.

1340346817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 1340346817 is about 36610.7472881939. The cubic root of 1340346817 is about 1102.5688768387.

The spelling of 1340346817 in words is "one billion, three hundred forty million, three hundred forty-six thousand, eight hundred seventeen".