2650981 has 2 divisors, whose sum is σ = 2650982. Its totient is φ = 2650980.

The previous prime is 2650969. The next prime is 2650987. The reversal of 2650981 is 1890562.

2650981 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., 2280100 + 370881 = 1510^2 + 609^2 .

It is a cyclic number.

It is not a de Polignac number, because 2650981 - 2⁷ = 2650853 is a prime.

It is a super-2 number, since 2×2650981² = 14055400524722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2650987) 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, 1325490 + 1325491.

It is an arithmetic number, because the mean of its divisors is an integer number (1325491).

2^2650981 is an apocalyptic number.

It is an amenable number.

2650981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2650981 is an equidigital number, since it uses as much as digits as its factorization.

2650981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 2650981 is about 1628.1833434844. The cubic root of 2650981 is about 138.3998241670.

The spelling of 2650981 in words is "two million, six hundred fifty thousand, nine hundred eighty-one".