1449499991 has 2 divisors, whose sum is σ = 1449499992. Its totient is φ = 1449499990.

The previous prime is 1449499967. The next prime is 1449499993. The reversal of 1449499991 is 1999949441.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1449499991 - 2⁶ = 1449499927 is a prime.

Together with 1449499993, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1449499991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1449499993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 724749995 + 724749996.

It is an arithmetic number, because the mean of its divisors is an integer number (724749996).

Almost surely, 2^1449499991 is an apocalyptic number.

1449499991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1449499991 is an equidigital number, since it uses as much as digits as its factorization.

1449499991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3779136, while the sum is 59.

The square root of 1449499991 is about 38072.2995234068. The cubic root of 1449499991 is about 1131.7210808254.

The spelling of 1449499991 in words is "one billion, four hundred forty-nine million, four hundred ninety-nine thousand, nine hundred ninety-one".