7639649273 has 2 divisors, whose sum is σ = 7639649274. Its totient is φ = 7639649272.

The previous prime is 7639649239. The next prime is 7639649399. The reversal of 7639649273 is 3729469367.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4368152464 + 3271496809 = 66092^2 + 57197^2 .

It is a cyclic number.

It is not a de Polignac number, because 7639649273 - 2¹⁶ = 7639583737 is a prime.

It is not a weakly prime, because it can be changed into another prime (7639649233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3819824636 + 3819824637.

It is an arithmetic number, because the mean of its divisors is an integer number (3819824637).

Almost surely, 2^7639649273 is an apocalyptic number.

It is an amenable number.

7639649273 is a deficient number, since it is larger than the sum of its proper divisors (1).

7639649273 is an equidigital number, since it uses as much as digits as its factorization.

7639649273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10287648, while the sum is 56.

The square root of 7639649273 is about 87405.0872260877. The cubic root of 7639649273 is about 1969.5082621767.

The spelling of 7639649273 in words is "seven billion, six hundred thirty-nine million, six hundred forty-nine thousand, two hundred seventy-three".