1340783417 has 2 divisors, whose sum is σ = 1340783418. Its totient is φ = 1340783416.

The previous prime is 1340783407. The next prime is 1340783471. The reversal of 1340783417 is 7143870431.

Together with next prime (1340783471) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 706549561 + 634233856 = 26581^2 + 25184^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340783417 - 2⁴ = 1340783401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340783407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670391708 + 670391709.

It is an arithmetic number, because the mean of its divisors is an integer number (670391709).

Almost surely, 2^1340783417 is an apocalyptic number.

It is an amenable number.

1340783417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340783417 is an equidigital number, since it uses as much as digits as its factorization.

1340783417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 1340783417 is about 36616.7095326710. The cubic root of 1340783417 is about 1102.6885795174.

The spelling of 1340783417 in words is "one billion, three hundred forty million, seven hundred eighty-three thousand, four hundred seventeen".