1361387987 has 2 divisors, whose sum is σ = 1361387988. Its totient is φ = 1361387986.

The previous prime is 1361387983. The next prime is 1361388037. The reversal of 1361387987 is 7897831631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1361387987 - 2² = 1361387983 is a prime.

It is a super-2 number, since 2×1361387987² = 3706754502295824338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1361387983) 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, 680693993 + 680693994.

It is an arithmetic number, because the mean of its divisors is an integer number (680693994).

Almost surely, 2^1361387987 is an apocalyptic number.

1361387987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361387987 is an equidigital number, since it uses as much as digits as its factorization.

1361387987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 53.

The square root of 1361387987 is about 36896.9915711295. The cubic root of 1361387987 is about 1108.3084336741.

The spelling of 1361387987 in words is "one billion, three hundred sixty-one million, three hundred eighty-seven thousand, nine hundred eighty-seven".