2908021 has 2 divisors, whose sum is σ = 2908022. Its totient is φ = 2908020.

The previous prime is 2908013. The next prime is 2908027. The reversal of 2908021 is 1208092.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2402500 + 505521 = 1550^2 + 711^2 .

It is a cyclic number.

It is not a de Polignac number, because 2908021 - 2³ = 2908013 is a prime.

It is a super-2 number, since 2×2908021² = 16913172272882, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 2907983 and 2908001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2908027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1454010 + 1454011.

It is an arithmetic number, because the mean of its divisors is an integer number (1454011).

2^2908021 is an apocalyptic number.

It is an amenable number.

2908021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2908021 is an equidigital number, since it uses as much as digits as its factorization.

2908021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 2908021 is about 1705.2920570976. The cubic root of 2908021 is about 142.7356683082.

The spelling of 2908021 in words is "two million, nine hundred eight thousand, twenty-one".