1031609 has 2 divisors, whose sum is σ = 1031610. Its totient is φ = 1031608.

The previous prime is 1031593. The next prime is 1031623. The reversal of 1031609 is 9061301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1006009 + 25600 = 1003^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031609 - 2⁴ = 1031593 is a prime.

It is equal to p₈₀₈₁₃ and since 1031609 and 80813 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (1031629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515804 + 515805.

It is an arithmetic number, because the mean of its divisors is an integer number (515805).

2^1031609 is an apocalyptic number.

It is an amenable number.

1031609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031609 is an equidigital number, since it uses as much as digits as its factorization.

1031609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 1031609 is about 1015.6815445798. The cubic root of 1031609 is about 101.0427228335.

The spelling of 1031609 in words is "one million, thirty-one thousand, six hundred nine".