2629621 has 2 divisors, whose sum is σ = 2629622. Its totient is φ = 2629620.

The previous prime is 2629591. The next prime is 2629639. The reversal of 2629621 is 1269262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2480625 + 148996 = 1575^2 + 386^2 .

It is a cyclic number.

It is not a de Polignac number, because 2629621 - 2⁵ = 2629589 is a prime.

2629621 is a lucky number.

It is equal to p₁₉₁₈₅₄ and since 2629621 and 191854 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2629621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2629651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1314810 + 1314811.

It is an arithmetic number, because the mean of its divisors is an integer number (1314811).

2^2629621 is an apocalyptic number.

It is an amenable number.

2629621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2629621 is an equidigital number, since it uses as much as digits as its factorization.

2629621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 2629621 is about 1621.6106191068. The cubic root of 2629621 is about 138.0271073264.

The spelling of 2629621 in words is "two million, six hundred twenty-nine thousand, six hundred twenty-one".