1351379857 has 2 divisors, whose sum is σ = 1351379858. Its totient is φ = 1351379856.

The previous prime is 1351379839. The next prime is 1351379891. The reversal of 1351379857 is 7589731531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1128892801 + 222487056 = 33599^2 + 14916^2 .

It is an emirp because it is prime and its reverse (7589731531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1351379857 - 2¹¹ = 1351377809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1351379857.

It is not a weakly prime, because it can be changed into another prime (1351319857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 675689928 + 675689929.

It is an arithmetic number, because the mean of its divisors is an integer number (675689929).

Almost surely, 2^1351379857 is an apocalyptic number.

It is an amenable number.

1351379857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1351379857 is an equidigital number, since it uses as much as digits as its factorization.

1351379857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 793800, while the sum is 49.

The square root of 1351379857 is about 36761.1188213852. The cubic root of 1351379857 is about 1105.5858722351.

The spelling of 1351379857 in words is "one billion, three hundred fifty-one million, three hundred seventy-nine thousand, eight hundred fifty-seven".