1313423987 has 2 divisors, whose sum is σ = 1313423988. Its totient is φ = 1313423986.

The previous prime is 1313423983. The next prime is 1313423989. The reversal of 1313423987 is 7893243131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1313423987 - 2² = 1313423983 is a prime.

Together with 1313423989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1313423983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656711993 + 656711994.

It is an arithmetic number, because the mean of its divisors is an integer number (656711994).

Almost surely, 2^1313423987 is an apocalyptic number.

1313423987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313423987 is an equidigital number, since it uses as much as digits as its factorization.

1313423987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 1313423987 is about 36241.1918540216. The cubic root of 1313423987 is about 1095.1366528786.

The spelling of 1313423987 in words is "one billion, three hundred thirteen million, four hundred twenty-three thousand, nine hundred eighty-seven".