1270747813 has 2 divisors, whose sum is σ = 1270747814. Its totient is φ = 1270747812.

The previous prime is 1270747811. The next prime is 1270747853. The reversal of 1270747813 is 3187470721.

It is an a-pointer prime, because the next prime (1270747853) can be obtained adding 1270747813 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1270708609 + 39204 = 35647^2 + 198^2 .

It is a cyclic number.

It is not a de Polignac number, because 1270747813 - 2¹ = 1270747811 is a prime.

It is a super-2 number, since 2×1270747813² = 3229600008488565938, which contains 22 as substring.

Together with 1270747811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1270747811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635373906 + 635373907.

It is an arithmetic number, because the mean of its divisors is an integer number (635373907).

Almost surely, 2^1270747813 is an apocalyptic number.

It is an amenable number.

1270747813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1270747813 is an equidigital number, since it uses as much as digits as its factorization.

1270747813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 1270747813 is about 35647.5498877553. The cubic root of 1270747813 is about 1083.1446451229.

The spelling of 1270747813 in words is "one billion, two hundred seventy million, seven hundred forty-seven thousand, eight hundred thirteen".