1361816957 has 2 divisors, whose sum is σ = 1361816958. Its totient is φ = 1361816956.

The previous prime is 1361816941. The next prime is 1361816969. The reversal of 1361816957 is 7596181631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1005777796 + 356039161 = 31714^2 + 18869^2 .

It is an emirp because it is prime and its reverse (7596181631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1361816957 - 2⁴ = 1361816941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1361116957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680908478 + 680908479.

It is an arithmetic number, because the mean of its divisors is an integer number (680908479).

Almost surely, 2^1361816957 is an apocalyptic number.

It is an amenable number.

1361816957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361816957 is an equidigital number, since it uses as much as digits as its factorization.

1361816957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 1361816957 is about 36902.8041888418. The cubic root of 1361816957 is about 1108.4248298683.

The spelling of 1361816957 in words is "one billion, three hundred sixty-one million, eight hundred sixteen thousand, nine hundred fifty-seven".