1449669991 has 8 divisors (see below), whose sum is σ = 1807380864. Its totient is φ = 1129612920.

The previous prime is 1449669971. The next prime is 1449669997. The reversal of 1449669991 is 1999669441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1449669991 - 2⁵ = 1449669959 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 (1449669997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9413365 + ... + 9413518.

It is an arithmetic number, because the mean of its divisors is an integer number (225922608).

Almost surely, 2^1449669991 is an apocalyptic number.

1449669991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1449669991 is a deficient number, since it is larger than the sum of its proper divisors (357710873).

1449669991 is a wasteful number, since it uses less digits than its factorization.

1449669991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18826901.

The product of its digits is 3779136, while the sum is 58.

The square root of 1449669991 is about 38074.5320522787. The cubic root of 1449669991 is about 1131.7653225327.

The spelling of 1449669991 in words is "one billion, four hundred forty-nine million, six hundred sixty-nine thousand, nine hundred ninety-one".