1361771197 has 2 divisors, whose sum is σ = 1361771198. Its totient is φ = 1361771196.

The previous prime is 1361771167. The next prime is 1361771207. The reversal of 1361771197 is 7911771631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 791803321 + 569967876 = 28139^2 + 23874^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1361771197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1361771107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680885598 + 680885599.

It is an arithmetic number, because the mean of its divisors is an integer number (680885599).

Almost surely, 2^1361771197 is an apocalyptic number.

It is an amenable number.

1361771197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361771197 is an equidigital number, since it uses as much as digits as its factorization.

1361771197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55566, while the sum is 43.

The square root of 1361771197 is about 36902.1841765498. The cubic root of 1361771197 is about 1108.4124145707.

The spelling of 1361771197 in words is "one billion, three hundred sixty-one million, seven hundred seventy-one thousand, one hundred ninety-seven".