1310399 has 2 divisors, whose sum is σ = 1310400. Its totient is φ = 1310398.

The previous prime is 1310389. The next prime is 1310417. The reversal of 1310399 is 9930131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1310399 - 2⁴ = 1310383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1310329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655199 + 655200.

It is an arithmetic number, because the mean of its divisors is an integer number (655200).

2^1310399 is an apocalyptic number.

1310399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1310399 is an equidigital number, since it uses as much as digits as its factorization.

1310399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729, while the sum is 26.

The square root of 1310399 is about 1144.7266049149. The cubic root of 1310399 is about 109.4295259015.

The spelling of 1310399 in words is "one million, three hundred ten thousand, three hundred ninety-nine".