1913448949 has 2 divisors, whose sum is σ = 1913448950. Its totient is φ = 1913448948.

The previous prime is 1913448947. The next prime is 1913448973. The reversal of 1913448949 is 9498443191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1674282724 + 239166225 = 40918^2 + 15465^2 .

It is an emirp because it is prime and its reverse (9498443191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1913448949 - 2¹ = 1913448947 is a prime.

It is a super-2 number, since 2×1913448949² = 7322573760858409202, which contains 22 as substring.

Together with 1913448947, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1913448896 and 1913448905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1913448947) 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, 956724474 + 956724475.

It is an arithmetic number, because the mean of its divisors is an integer number (956724475).

Almost surely, 2^1913448949 is an apocalyptic number.

It is an amenable number.

1913448949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1913448949 is an equidigital number, since it uses as much as digits as its factorization.

1913448949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 52.

The square root of 1913448949 is about 43742.9874265579. The cubic root of 1913448949 is about 1241.4778055909.

The spelling of 1913448949 in words is "one billion, nine hundred thirteen million, four hundred forty-eight thousand, nine hundred forty-nine".