1631117 has 2 divisors, whose sum is σ = 1631118. Its totient is φ = 1631116.

The previous prime is 1631101. The next prime is 1631143. The reversal of 1631117 is 7111361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1196836 + 434281 = 1094^2 + 659^2 .

It is a cyclic number.

It is not a de Polignac number, because 1631117 - 2⁴ = 1631101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1631177) 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, 815558 + 815559.

It is an arithmetic number, because the mean of its divisors is an integer number (815559).

2^1631117 is an apocalyptic number.

It is an amenable number.

1631117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631117 is an equidigital number, since it uses as much as digits as its factorization.

1631117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126, while the sum is 20.

The square root of 1631117 is about 1277.1519095237. The cubic root of 1631117 is about 117.7140687906.

Adding to 1631117 its reverse (7111361), we get a palindrome (8742478).

The spelling of 1631117 in words is "one million, six hundred thirty-one thousand, one hundred seventeen".