2045647 has 2 divisors, whose sum is σ = 2045648. Its totient is φ = 2045646.

The previous prime is 2045629. The next prime is 2045651. The reversal of 2045647 is 7465402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2045647 - 2¹¹ = 2043599 is a prime.

It is a Chen prime.

2045647 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2045677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1022823 + 1022824.

It is an arithmetic number, because the mean of its divisors is an integer number (1022824).

2^2045647 is an apocalyptic number.

2045647 is a deficient number, since it is larger than the sum of its proper divisors (1).

2045647 is an equidigital number, since it uses as much as digits as its factorization.

2045647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 2045647 is about 1430.2611649625. The cubic root of 2045647 is about 126.9434306931.

It can be divided in two parts, 20456 and 47, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 2045647 in words is "two million, forty-five thousand, six hundred forty-seven".