1361942663 has 2 divisors, whose sum is σ = 1361942664. Its totient is φ = 1361942662.

The previous prime is 1361942627. The next prime is 1361942671. The reversal of 1361942663 is 3662491631.

It is a strong prime.

It is an emirp because it is prime and its reverse (3662491631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1361942663 - 2¹⁰ = 1361941639 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1361942663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1361942563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680971331 + 680971332.

It is an arithmetic number, because the mean of its divisors is an integer number (680971332).

Almost surely, 2^1361942663 is an apocalyptic number.

1361942663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361942663 is an equidigital number, since it uses as much as digits as its factorization.

1361942663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 41.

The square root of 1361942663 is about 36904.5073534385. The cubic root of 1361942663 is about 1108.4589341494.

The spelling of 1361942663 in words is "one billion, three hundred sixty-one million, nine hundred forty-two thousand, six hundred sixty-three".