1313987 has 2 divisors, whose sum is σ = 1313988. Its totient is φ = 1313986.

The previous prime is 1313959. The next prime is 1313999. The reversal of 1313987 is 7893131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1313987 - 2⁸ = 1313731 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1313957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656993 + 656994.

It is an arithmetic number, because the mean of its divisors is an integer number (656994).

2^1313987 is an apocalyptic number.

1313987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313987 is an equidigital number, since it uses as much as digits as its factorization.

1313987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 32.

The square root of 1313987 is about 1146.2927200327. The cubic root of 1313987 is about 109.5293111138.

The spelling of 1313987 in words is "one million, three hundred thirteen thousand, nine hundred eighty-seven".