1628369 has 2 divisors, whose sum is σ = 1628370. Its totient is φ = 1628368.

The previous prime is 1628359. The next prime is 1628381. The reversal of 1628369 is 9638261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 883600 + 744769 = 940^2 + 863^2 .

It is an emirp because it is prime and its reverse (9638261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1628369 - 2⁴ = 1628353 is a prime.

It is a super-2 number, since 2×1628369² = 5303171200322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1628309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814184 + 814185.

It is an arithmetic number, because the mean of its divisors is an integer number (814185).

2^1628369 is an apocalyptic number.

It is an amenable number.

1628369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1628369 is an equidigital number, since it uses as much as digits as its factorization.

1628369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 1628369 is about 1276.0756247182. The cubic root of 1628369 is about 117.6479259593.

The spelling of 1628369 in words is "one million, six hundred twenty-eight thousand, three hundred sixty-nine".