1671629 has 2 divisors, whose sum is σ = 1671630. Its totient is φ = 1671628.

The previous prime is 1671619. The next prime is 1671641. The reversal of 1671629 is 9261761.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 902500 + 769129 = 950^2 + 877^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1671629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1671595 and 1671604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1671619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835814 + 835815.

It is an arithmetic number, because the mean of its divisors is an integer number (835815).

2^1671629 is an apocalyptic number.

It is an amenable number.

1671629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671629 is an equidigital number, since it uses as much as digits as its factorization.

1671629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 32.

The square root of 1671629 is about 1292.9149237285. The cubic root of 1671629 is about 118.6806634937.

The spelling of 1671629 in words is "one million, six hundred seventy-one thousand, six hundred twenty-nine".