7948970649 has 27 divisors (see below), whose sum is σ = 11628569407. Its totient is φ = 5232446016.

The previous prime is 7948970639. The next prime is 7948970681. The reversal of 7948970649 is 9460798497.

The square root of 7948970649 is 89157.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 140067225 + 7808903424 = 11835^2 + 88368^2 .

It is not a de Polignac number, because 7948970649 - 2⁷ = 7948970521 is a prime.

It is a super-2 number, since 2×7948970649² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7948970639) 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 in 26 ways as a sum of consecutive naturals, for example, 30224092 + ... + 30224354.

Almost surely, 2^7948970649 is an apocalyptic number.

7948970649 is the 89157-th square number.

7948970649 is the 44579-th centered octagonal number.

It is an amenable number.

7948970649 is a deficient number, since it is larger than the sum of its proper divisors (3679598758).

7948970649 is an equidigital number, since it uses as much as digits as its factorization.

7948970649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 63.

The cubic root of 7948970649 is about 1995.7384802574.

The spelling of 7948970649 in words is "seven billion, nine hundred forty-eight million, nine hundred seventy thousand, six hundred forty-nine".