1449291091 has 4 divisors (see below), whose sum is σ = 1452835000. Its totient is φ = 1445747184.

The previous prime is 1449291071. The next prime is 1449291097. The reversal of 1449291091 is 1901929441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1901929441 = 32579 ⋅58379.

It is a cyclic number.

It is not a de Polignac number, because 1449291091 - 2¹¹ = 1449289043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1449291097) 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, 1771341 + ... + 1772158.

It is an arithmetic number, because the mean of its divisors is an integer number (363208750).

Almost surely, 2^1449291091 is an apocalyptic number.

1449291091 is a deficient number, since it is larger than the sum of its proper divisors (3543909).

1449291091 is an equidigital number, since it uses as much as digits as its factorization.

1449291091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3543908.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 1449291091 is about 38069.5559601107. Note that the first 3 decimals coincide. The cubic root of 1449291091 is about 1131.6667108372. Note that the first 3 decimals are identical.

The spelling of 1449291091 in words is "one billion, four hundred forty-nine million, two hundred ninety-one thousand, ninety-one".