1361776831 has 2 divisors, whose sum is σ = 1361776832. Its totient is φ = 1361776830.

The previous prime is 1361776813. The next prime is 1361776837. The reversal of 1361776831 is 1386771631.

Together with previous prime (1361776813) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1361776831 is a prime.

It is a super-2 number, since 2×1361776831² = 3708872274896805122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1361776837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680888415 + 680888416.

It is an arithmetic number, because the mean of its divisors is an integer number (680888416).

Almost surely, 2^1361776831 is an apocalyptic number.

1361776831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361776831 is an equidigital number, since it uses as much as digits as its factorization.

1361776831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 43.

The square root of 1361776831 is about 36902.2605134157. The cubic root of 1361776831 is about 1108.4139431650.

The spelling of 1361776831 in words is "one billion, three hundred sixty-one million, seven hundred seventy-six thousand, eight hundred thirty-one".