1317642049 has 2 divisors, whose sum is σ = 1317642050. Its totient is φ = 1317642048.

The previous prime is 1317642019. The next prime is 1317642097. The reversal of 1317642049 is 9402467131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 988473600 + 329168449 = 31440^2 + 18143^2 .

It is an emirp because it is prime and its reverse (9402467131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1317642049 - 2⁵ = 1317642017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1317641999 and 1317642017.

It is not a weakly prime, because it can be changed into another prime (1317642019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658821024 + 658821025.

It is an arithmetic number, because the mean of its divisors is an integer number (658821025).

Almost surely, 2^1317642049 is an apocalyptic number.

It is an amenable number.

1317642049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317642049 is an equidigital number, since it uses as much as digits as its factorization.

1317642049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 1317642049 is about 36299.3395118975. The cubic root of 1317642049 is about 1096.3077441459.

It can be divided in two parts, 13176 and 42049, that added together give a square (55225 = 235²).

The spelling of 1317642049 in words is "one billion, three hundred seventeen million, six hundred forty-two thousand, forty-nine".