2908621 has 2 divisors, whose sum is σ = 2908622. Its totient is φ = 2908620.

The previous prime is 2908601. The next prime is 2908627. The reversal of 2908621 is 1268092.

It is a happy number.

2908621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1729225 + 1179396 = 1315^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 2908621 - 2²¹ = 811469 is a prime.

It is a super-2 number, since 2×2908621² = 16920152243282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2908621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2908627) 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, 1454310 + 1454311.

It is an arithmetic number, because the mean of its divisors is an integer number (1454311).

2^2908621 is an apocalyptic number.

It is an amenable number.

2908621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2908621 is an equidigital number, since it uses as much as digits as its factorization.

2908621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 2908621 is about 1705.4679709687. The cubic root of 2908621 is about 142.7454843208.

It can be divided in two parts, 290 and 8621, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 2908621 in words is "two million, nine hundred eight thousand, six hundred twenty-one".