1444896491 has 4 divisors (see below), whose sum is σ = 1463186400. Its totient is φ = 1426606584.

The previous prime is 1444896451. The next prime is 1444896499. The reversal of 1444896491 is 1946984441.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1444896491 is a prime.

It is a super-2 number, since 2×1444896491² = 4175451739408226162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1444896499) 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, 9144836 + ... + 9144993.

It is an arithmetic number, because the mean of its divisors is an integer number (365796600).

Almost surely, 2^1444896491 is an apocalyptic number.

1444896491 is a deficient number, since it is larger than the sum of its proper divisors (18289909).

1444896491 is an equidigital number, since it uses as much as digits as its factorization.

1444896491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18289908.

The product of its digits is 995328, while the sum is 50.

The square root of 1444896491 is about 38011.7941039357. The cubic root of 1444896491 is about 1130.5217239966.

The spelling of 1444896491 in words is "one billion, four hundred forty-four million, eight hundred ninety-six thousand, four hundred ninety-one".