449387993 has 2 divisors, whose sum is σ = 449387994. Its totient is φ = 449387992.

The previous prime is 449387987. The next prime is 449387999. The reversal of 449387993 is 399783944.

It is a balanced prime because it is at equal distance from previous prime (449387987) and next prime (449387999).

It can be written as a sum of positive squares in only one way, i.e., 275991769 + 173396224 = 16613^2 + 13168^2 .

It is a cyclic number.

It is not a de Polignac number, because 449387993 - 2¹⁰ = 449386969 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (449387999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224693996 + 224693997.

It is an arithmetic number, because the mean of its divisors is an integer number (224693997).

Almost surely, 2^449387993 is an apocalyptic number.

It is an amenable number.

449387993 is a deficient number, since it is larger than the sum of its proper divisors (1).

449387993 is an equidigital number, since it uses as much as digits as its factorization.

449387993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 56.

The square root of 449387993 is about 21198.7733843258. The cubic root of 449387993 is about 765.9618772029.

The spelling of 449387993 in words is "four hundred forty-nine million, three hundred eighty-seven thousand, nine hundred ninety-three".