2869621 has 2 divisors, whose sum is σ = 2869622. Its totient is φ = 2869620.

The previous prime is 2869613. The next prime is 2869649. The reversal of 2869621 is 1269682.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2852721 + 16900 = 1689^2 + 130^2 .

It is a cyclic number.

It is not a de Polignac number, because 2869621 - 2³ = 2869613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2869721) 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, 1434810 + 1434811.

It is an arithmetic number, because the mean of its divisors is an integer number (1434811).

2^2869621 is an apocalyptic number.

It is an amenable number.

2869621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2869621 is an equidigital number, since it uses as much as digits as its factorization.

2869621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 2869621 is about 1693.9955726034. The cubic root of 2869621 is about 142.1046144388.

The spelling of 2869621 in words is "two million, eight hundred sixty-nine thousand, six hundred twenty-one".