1031399 has 2 divisors, whose sum is σ = 1031400. Its totient is φ = 1031398.

The previous prime is 1031357. The next prime is 1031411. The reversal of 1031399 is 9931301.

It is a strong prime.

It is an emirp because it is prime and its reverse (9931301) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031399 is a prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515699 + 515700.

It is an arithmetic number, because the mean of its divisors is an integer number (515700).

2^1031399 is an apocalyptic number.

1031399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031399 is an equidigital number, since it uses as much as digits as its factorization.

1031399 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 1031399 is about 1015.5781604584. The cubic root of 1031399 is about 101.0358660975.

The spelling of 1031399 in words is "one million, thirty-one thousand, three hundred ninety-nine".