1398031 has 2 divisors, whose sum is σ = 1398032. Its totient is φ = 1398030.

The previous prime is 1398017. The next prime is 1398037. The reversal of 1398031 is 1308931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1398031 - 2⁵ = 1397999 is a prime.

It is a super-2 number, since 2×1398031² = 3908981353922, which contains 22 as substring.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 1397987 and 1398005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1398037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699015 + 699016.

It is an arithmetic number, because the mean of its divisors is an integer number (699016).

2^1398031 is an apocalyptic number.

1398031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398031 is an equidigital number, since it uses as much as digits as its factorization.

1398031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1398031 is about 1182.3836094940. The cubic root of 1398031 is about 111.8164243991.

The spelling of 1398031 in words is "one million, three hundred ninety-eight thousand, thirty-one".