19700449 has 2 divisors, whose sum is σ = 19700450. Its totient is φ = 19700448.

The previous prime is 19700363. The next prime is 19700453. The reversal of 19700449 is 94400791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9891025 + 9809424 = 3145^2 + 3132^2 .

It is a cyclic number.

It is not a de Polignac number, because 19700449 - 2¹⁷ = 19569377 is a prime.

It is not a weakly prime, because it can be changed into another prime (19701449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9850224 + 9850225.

It is an arithmetic number, because the mean of its divisors is an integer number (9850225).

Almost surely, 2^19700449 is an apocalyptic number.

It is an amenable number.

19700449 is a deficient number, since it is larger than the sum of its proper divisors (1).

19700449 is an equidigital number, since it uses as much as digits as its factorization.

19700449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 19700449 is about 4438.5187844595. The cubic root of 19700449 is about 270.0797615288.

The spelling of 19700449 in words is "nineteen million, seven hundred thousand, four hundred forty-nine".