2170278449 has 2 divisors, whose sum is σ = 2170278450. Its totient is φ = 2170278448.

The previous prime is 2170278431. The next prime is 2170278469. The reversal of 2170278449 is 9448720712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1215777424 + 954501025 = 34868^2 + 30895^2 .

It is a cyclic number.

It is not a de Polignac number, because 2170278449 - 2⁸ = 2170278193 is a prime.

It is not a weakly prime, because it can be changed into another prime (2170278419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085139224 + 1085139225.

It is an arithmetic number, because the mean of its divisors is an integer number (1085139225).

Almost surely, 2^2170278449 is an apocalyptic number.

It is an amenable number.

2170278449 is a deficient number, since it is larger than the sum of its proper divisors (1).

2170278449 is an equidigital number, since it uses as much as digits as its factorization.

2170278449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 2170278449 is about 46586.2474234618. The cubic root of 2170278449 is about 1294.7079635449.

The spelling of 2170278449 in words is "two billion, one hundred seventy million, two hundred seventy-eight thousand, four hundred forty-nine".