1373270861 has 2 divisors, whose sum is σ = 1373270862. Its totient is φ = 1373270860.

The previous prime is 1373270837. The next prime is 1373270869. The reversal of 1373270861 is 1680723731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1077086761 + 296184100 = 32819^2 + 17210^2 .

It is a cyclic number.

It is not a de Polignac number, because 1373270861 - 2¹⁸ = 1373008717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1373270869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686635430 + 686635431.

It is an arithmetic number, because the mean of its divisors is an integer number (686635431).

Almost surely, 2^1373270861 is an apocalyptic number.

It is an amenable number.

1373270861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373270861 is an equidigital number, since it uses as much as digits as its factorization.

1373270861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 1373270861 is about 37057.6693951468. The cubic root of 1373270861 is about 1111.5237199703.

The spelling of 1373270861 in words is "one billion, three hundred seventy-three million, two hundred seventy thousand, eight hundred sixty-one".