449191693 has 4 divisors (see below), whose sum is σ = 449302140. Its totient is φ = 449081248.

The previous prime is 449191669. The next prime is 449191733. The reversal of 449191693 is 396191944.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 292991689 + 156200004 = 17117^2 + 12498^2 .

It is a cyclic number.

It is not a de Polignac number, because 449191693 - 2⁹ = 449191181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449191993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48880 + ... + 57337.

It is an arithmetic number, because the mean of its divisors is an integer number (112325535).

Almost surely, 2^449191693 is an apocalyptic number.

It is an amenable number.

449191693 is a deficient number, since it is larger than the sum of its proper divisors (110447).

449191693 is a wasteful number, since it uses less digits than its factorization.

449191693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110446.

The product of its digits is 209952, while the sum is 46.

The square root of 449191693 is about 21194.1428937336. The cubic root of 449191693 is about 765.8503327490.

The spelling of 449191693 in words is "four hundred forty-nine million, one hundred ninety-one thousand, six hundred ninety-three".