1344781849 has 2 divisors, whose sum is σ = 1344781850. Its totient is φ = 1344781848.

The previous prime is 1344781847. The next prime is 1344781859. The reversal of 1344781849 is 9481874431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 967645449 + 377136400 = 31107^2 + 19420^2 .

It is a cyclic number.

It is not a de Polignac number, because 1344781849 - 2¹ = 1344781847 is a prime.

Together with 1344781847, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1344781847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672390924 + 672390925.

It is an arithmetic number, because the mean of its divisors is an integer number (672390925).

Almost surely, 2^1344781849 is an apocalyptic number.

It is an amenable number.

1344781849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1344781849 is an equidigital number, since it uses as much as digits as its factorization.

1344781849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 49.

The square root of 1344781849 is about 36671.2673492477. The cubic root of 1344781849 is about 1103.7836233268.

The spelling of 1344781849 in words is "one billion, three hundred forty-four million, seven hundred eighty-one thousand, eight hundred forty-nine".