1449358991 has 2 divisors, whose sum is σ = 1449358992. Its totient is φ = 1449358990.

The previous prime is 1449358951. The next prime is 1449358993. The reversal of 1449358991 is 1998539441.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1449358991 - 2⁶ = 1449358927 is a prime.

Together with 1449358993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1449358993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 724679495 + 724679496.

It is an arithmetic number, because the mean of its divisors is an integer number (724679496).

Almost surely, 2^1449358991 is an apocalyptic number.

1449358991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1449358991 is an equidigital number, since it uses as much as digits as its factorization.

1449358991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 53.

The square root of 1449358991 is about 38070.4477383705. The cubic root of 1449358991 is about 1131.6843836085.

The spelling of 1449358991 in words is "one billion, four hundred forty-nine million, three hundred fifty-eight thousand, nine hundred ninety-one".