7926397649 has 2 divisors, whose sum is σ = 7926397650. Its totient is φ = 7926397648.

The previous prime is 7926397627. The next prime is 7926397709. The reversal of 7926397649 is 9467936297.

7926397649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4295491600 + 3630906049 = 65540^2 + 60257^2 .

It is a cyclic number.

It is not a de Polignac number, because 7926397649 - 2⁸ = 7926397393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7926397591 and 7926397600.

It is not a weakly prime, because it can be changed into another prime (7926397249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3963198824 + 3963198825.

It is an arithmetic number, because the mean of its divisors is an integer number (3963198825).

Almost surely, 2^7926397649 is an apocalyptic number.

It is an amenable number.

7926397649 is a deficient number, since it is larger than the sum of its proper divisors (1).

7926397649 is an equidigital number, since it uses as much as digits as its factorization.

7926397649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30862944, while the sum is 62.

The square root of 7926397649 is about 89030.3187066069. The cubic root of 7926397649 is about 1993.8475639222.

The spelling of 7926397649 in words is "seven billion, nine hundred twenty-six million, three hundred ninety-seven thousand, six hundred forty-nine".