7831698649 has 2 divisors, whose sum is σ = 7831698650. Its totient is φ = 7831698648.

The previous prime is 7831698631. The next prime is 7831698659. The reversal of 7831698649 is 9468961387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7827825625 + 3873024 = 88475^2 + 1968^2 .

It is a cyclic number.

It is not a de Polignac number, because 7831698649 - 2⁹ = 7831698137 is a prime.

It is a super-2 number, since 2×7831698649² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7831698619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3915849324 + 3915849325.

It is an arithmetic number, because the mean of its divisors is an integer number (3915849325).

Almost surely, 2^7831698649 is an apocalyptic number.

It is an amenable number.

7831698649 is a deficient number, since it is larger than the sum of its proper divisors (1).

7831698649 is an equidigital number, since it uses as much as digits as its factorization.

7831698649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15676416, while the sum is 61.

The square root of 7831698649 is about 88496.8849677773. The cubic root of 7831698649 is about 1985.8753696535.

The spelling of 7831698649 in words is "seven billion, eight hundred thirty-one million, six hundred ninety-eight thousand, six hundred forty-nine".