7740047129 has 2 divisors, whose sum is σ = 7740047130. Its totient is φ = 7740047128.

The previous prime is 7740047093. The next prime is 7740047153. The reversal of 7740047129 is 9217400477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5292271504 + 2447775625 = 72748^2 + 49475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7740047129 is a prime.

It is a super-2 number, since 2×7740047129² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7740047629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3870023564 + 3870023565.

It is an arithmetic number, because the mean of its divisors is an integer number (3870023565).

Almost surely, 2^7740047129 is an apocalyptic number.

It is an amenable number.

7740047129 is a deficient number, since it is larger than the sum of its proper divisors (1).

7740047129 is an equidigital number, since it uses as much as digits as its factorization.

7740047129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784, while the sum is 41.

The square root of 7740047129 is about 87977.5376388769. The cubic root of 7740047129 is about 1978.0982938773.

The spelling of 7740047129 in words is "seven billion, seven hundred forty million, forty-seven thousand, one hundred twenty-nine".