2022649 has 2 divisors, whose sum is σ = 2022650. Its totient is φ = 2022648.

The previous prime is 2022641. The next prime is 2022659. The reversal of 2022649 is 9462202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1836025 + 186624 = 1355^2 + 432^2 .

It is a cyclic number.

It is not a de Polignac number, because 2022649 - 2³ = 2022641 is a prime.

It is a super-2 number, since 2×2022649² = 8182217954402, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2022641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1011324 + 1011325.

It is an arithmetic number, because the mean of its divisors is an integer number (1011325).

2^2022649 is an apocalyptic number.

It is an amenable number.

2022649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2022649 is an equidigital number, since it uses as much as digits as its factorization.

2022649 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 25.

The square root of 2022649 is about 1422.1986499783. The cubic root of 2022649 is about 126.4659200898.

The spelling of 2022649 in words is "two million, twenty-two thousand, six hundred forty-nine".