647411449 has 2 divisors, whose sum is σ = 647411450. Its totient is φ = 647411448.

The previous prime is 647411437. The next prime is 647411467. The reversal of 647411449 is 944114746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 593653225 + 53758224 = 24365^2 + 7332^2 .

It is a cyclic number.

It is not a de Polignac number, because 647411449 - 2⁷ = 647411321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (647411489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323705724 + 323705725.

It is an arithmetic number, because the mean of its divisors is an integer number (323705725).

Almost surely, 2^647411449 is an apocalyptic number.

It is an amenable number.

647411449 is a deficient number, since it is larger than the sum of its proper divisors (1).

647411449 is an equidigital number, since it uses as much as digits as its factorization.

647411449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 40.

The square root of 647411449 is about 25444.2812631837. The cubic root of 647411449 is about 865.0876759671.

The spelling of 647411449 in words is "six hundred forty-seven million, four hundred eleven thousand, four hundred forty-nine".