1270340789 has 2 divisors, whose sum is σ = 1270340790. Its totient is φ = 1270340788.

The previous prime is 1270340783. The next prime is 1270340831. The reversal of 1270340789 is 9870430721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 990046225 + 280294564 = 31465^2 + 16742^2 .

It is a cyclic number.

It is not a de Polignac number, because 1270340789 - 2²⁴ = 1253563573 is a prime.

It is a super-2 number, since 2×1270340789² = 3227531440394285042, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1270340783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635170394 + 635170395.

It is an arithmetic number, because the mean of its divisors is an integer number (635170395).

Almost surely, 2^1270340789 is an apocalyptic number.

It is an amenable number.

1270340789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1270340789 is an equidigital number, since it uses as much as digits as its factorization.

1270340789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 1270340789 is about 35641.8404266671. The cubic root of 1270340789 is about 1083.0289880429.

The spelling of 1270340789 in words is "one billion, two hundred seventy million, three hundred forty thousand, seven hundred eighty-nine".