1449189893 has 2 divisors, whose sum is σ = 1449189894. Its totient is φ = 1449189892.

The previous prime is 1449189881. The next prime is 1449189901. The reversal of 1449189893 is 3989819441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1157224324 + 291965569 = 34018^2 + 17087^2 .

It is a cyclic number.

It is not a de Polignac number, because 1449189893 - 2³⁰ = 375448069 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1449189593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 724594946 + 724594947.

It is an arithmetic number, because the mean of its divisors is an integer number (724594947).

Almost surely, 2^1449189893 is an apocalyptic number.

It is an amenable number.

1449189893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1449189893 is an equidigital number, since it uses as much as digits as its factorization.

1449189893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 56.

The square root of 1449189893 is about 38068.2268171240. The cubic root of 1449189893 is about 1131.6403703562.

The spelling of 1449189893 in words is "one billion, four hundred forty-nine million, one hundred eighty-nine thousand, eight hundred ninety-three".