1676621 has 2 divisors, whose sum is σ = 1676622. Its totient is φ = 1676620.

The previous prime is 1676611. The next prime is 1676627. The reversal of 1676621 is 1266761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1464100 + 212521 = 1210^2 + 461^2 .

It is an emirp because it is prime and its reverse (1266761) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1676621 is a prime.

It is a super-2 number, since 2×1676621² = 5622115955282, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1676627) 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, 838310 + 838311.

It is an arithmetic number, because the mean of its divisors is an integer number (838311).

2^1676621 is an apocalyptic number.

It is an amenable number.

1676621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1676621 is an equidigital number, since it uses as much as digits as its factorization.

1676621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 29.

The square root of 1676621 is about 1294.8440060486. The cubic root of 1676621 is about 118.7986851158.

The spelling of 1676621 in words is "one million, six hundred seventy-six thousand, six hundred twenty-one".