7976990969 has 4 divisors (see below), whose sum is σ = 7978357860. Its totient is φ = 7975624080.

The previous prime is 7976990953. The next prime is 7976990999. The reversal of 7976990969 is 9690996797.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3411961744 + 4565029225 = 58412^2 + 67565^2 .

It is a cyclic number.

It is not a de Polignac number, because 7976990969 - 2⁴ = 7976990953 is a prime.

It is a super-2 number, since 2×7976990969² (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 (7976990929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 674654 + ... + 686375.

It is an arithmetic number, because the mean of its divisors is an integer number (1994589465).

Almost surely, 2^7976990969 is an apocalyptic number.

It is an amenable number.

7976990969 is a deficient number, since it is larger than the sum of its proper divisors (1366891).

7976990969 is a wasteful number, since it uses less digits than its factorization.

7976990969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366890.

The product of its (nonzero) digits is 104162436, while the sum is 71.

The square root of 7976990969 is about 89314.0020881385. The cubic root of 7976990969 is about 1998.0807395588.

The spelling of 7976990969 in words is "seven billion, nine hundred seventy-six million, nine hundred ninety thousand, nine hundred sixty-nine".