7640713247 has 2 divisors, whose sum is σ = 7640713248. Its totient is φ = 7640713246.

The previous prime is 7640713243. The next prime is 7640713261. The reversal of 7640713247 is 7423170467.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7640713247 - 2² = 7640713243 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7640713243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3820356623 + 3820356624.

It is an arithmetic number, because the mean of its divisors is an integer number (3820356624).

Almost surely, 2^7640713247 is an apocalyptic number.

7640713247 is a deficient number, since it is larger than the sum of its proper divisors (1).

7640713247 is an equidigital number, since it uses as much as digits as its factorization.

7640713247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 41.

The square root of 7640713247 is about 87411.1734676981. The cubic root of 7640713247 is about 1969.5996890750.

The spelling of 7640713247 in words is "seven billion, six hundred forty million, seven hundred thirteen thousand, two hundred forty-seven".