1342443649 has 2 divisors, whose sum is σ = 1342443650. Its totient is φ = 1342443648.

The previous prime is 1342443643. The next prime is 1342443679. The reversal of 1342443649 is 9463442431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1341903424 + 540225 = 36632^2 + 735^2 .

It is an emirp because it is prime and its reverse (9463442431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1342443649 - 2⁷ = 1342443521 is a prime.

It is not a weakly prime, because it can be changed into another prime (1342443643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671221824 + 671221825.

It is an arithmetic number, because the mean of its divisors is an integer number (671221825).

Almost surely, 2^1342443649 is an apocalyptic number.

It is an amenable number.

1342443649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1342443649 is an equidigital number, since it uses as much as digits as its factorization.

1342443649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 40.

The square root of 1342443649 is about 36639.3729340446. The cubic root of 1342443649 is about 1103.1435284002.

The spelling of 1342443649 in words is "one billion, three hundred forty-two million, four hundred forty-three thousand, six hundred forty-nine".