7427761249 has 2 divisors, whose sum is σ = 7427761250. Its totient is φ = 7427761248.

The previous prime is 7427761183. The next prime is 7427761259. The reversal of 7427761249 is 9421677247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7044580624 + 383180625 = 83932^2 + 19575^2 .

It is a cyclic number.

It is not a de Polignac number, because 7427761249 - 2¹³ = 7427753057 is a prime.

It is not a weakly prime, because it can be changed into another prime (7427761259) 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, 3713880624 + 3713880625.

It is an arithmetic number, because the mean of its divisors is an integer number (3713880625).

Almost surely, 2^7427761249 is an apocalyptic number.

It is an amenable number.

7427761249 is a deficient number, since it is larger than the sum of its proper divisors (1).

7427761249 is an equidigital number, since it uses as much as digits as its factorization.

7427761249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1185408, while the sum is 49.

The square root of 7427761249 is about 86184.4606005050. The cubic root of 7427761249 is about 1951.1289757818.

The spelling of 7427761249 in words is "seven billion, four hundred twenty-seven million, seven hundred sixty-one thousand, two hundred forty-nine".