7813240949 has 2 divisors, whose sum is σ = 7813240950. Its totient is φ = 7813240948.

The previous prime is 7813240927. The next prime is 7813240957. The reversal of 7813240949 is 9490423187.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7236904900 + 576336049 = 85070^2 + 24007^2 .

It is a cyclic number.

It is not a de Polignac number, because 7813240949 - 2¹⁶ = 7813175413 is a prime.

It is a super-2 number, since 2×7813240949² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7813240909) 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, 3906620474 + 3906620475.

It is an arithmetic number, because the mean of its divisors is an integer number (3906620475).

Almost surely, 2^7813240949 is an apocalyptic number.

It is an amenable number.

7813240949 is a deficient number, since it is larger than the sum of its proper divisors (1).

7813240949 is an equidigital number, since it uses as much as digits as its factorization.

7813240949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 7813240949 is about 88392.5389894419. The cubic root of 7813240949 is about 1984.3140427491.

The spelling of 7813240949 in words is "seven billion, eight hundred thirteen million, two hundred forty thousand, nine hundred forty-nine".