1448631391 has 2 divisors, whose sum is σ = 1448631392. Its totient is φ = 1448631390.

The previous prime is 1448631361. The next prime is 1448631407. The reversal of 1448631391 is 1931368441.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1448631391 - 2⁹ = 1448630879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1448631361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 724315695 + 724315696.

It is an arithmetic number, because the mean of its divisors is an integer number (724315696).

Almost surely, 2^1448631391 is an apocalyptic number.

1448631391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1448631391 is an equidigital number, since it uses as much as digits as its factorization.

1448631391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 1448631391 is about 38060.8905702428. The cubic root of 1448631391 is about 1131.4949777194.

The spelling of 1448631391 in words is "one billion, four hundred forty-eight million, six hundred thirty-one thousand, three hundred ninety-one".