1631629 has 2 divisors, whose sum is σ = 1631630. Its totient is φ = 1631628.

The previous prime is 1631611. The next prime is 1631633. The reversal of 1631629 is 9261361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1630729 + 900 = 1277^2 + 30^2 .

It is an emirp because it is prime and its reverse (9261361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1631629 - 2⁹ = 1631117 is a prime.

It is a Chen prime.

1631629 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1631597 and 1631606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1631639) 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, 815814 + 815815.

It is an arithmetic number, because the mean of its divisors is an integer number (815815).

2^1631629 is an apocalyptic number.

It is an amenable number.

1631629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631629 is an equidigital number, since it uses as much as digits as its factorization.

1631629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 28.

The square root of 1631629 is about 1277.3523398029. The cubic root of 1631629 is about 117.7263841340.

The spelling of 1631629 in words is "one million, six hundred thirty-one thousand, six hundred twenty-nine".