1447659749 has 2 divisors, whose sum is σ = 1447659750. Its totient is φ = 1447659748.

The previous prime is 1447659727. The next prime is 1447659751. The reversal of 1447659749 is 9479567441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 862890625 + 584769124 = 29375^2 + 24182^2 .

It is an emirp because it is prime and its reverse (9479567441) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1447659749 is a prime.

Together with 1447659751, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1447659694 and 1447659703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1447659709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 723829874 + 723829875.

It is an arithmetic number, because the mean of its divisors is an integer number (723829875).

Almost surely, 2^1447659749 is an apocalyptic number.

It is an amenable number.

1447659749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1447659749 is an equidigital number, since it uses as much as digits as its factorization.

1447659749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 56.

The square root of 1447659749 is about 38048.1241193308. The cubic root of 1447659749 is about 1131.2419448812.

The spelling of 1447659749 in words is "one billion, four hundred forty-seven million, six hundred fifty-nine thousand, seven hundred forty-nine".