7869652981 has 2 divisors, whose sum is σ = 7869652982. Its totient is φ = 7869652980.

The previous prime is 7869652979. The next prime is 7869653003. The reversal of 7869652981 is 1892569687.

7869652981 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., 5485772356 + 2383880625 = 74066^2 + 48825^2 .

It is a cyclic number.

It is not a de Polignac number, because 7869652981 - 2¹ = 7869652979 is a prime.

It is a super-2 number, since 2×7869652981² (a number of 21 digits) contains 22 as substring.

Together with 7869652979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7869652961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3934826490 + 3934826491.

It is an arithmetic number, because the mean of its divisors is an integer number (3934826491).

Almost surely, 2^7869652981 is an apocalyptic number.

It is an amenable number.

7869652981 is a deficient number, since it is larger than the sum of its proper divisors (1).

7869652981 is an equidigital number, since it uses as much as digits as its factorization.

7869652981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 61.

The square root of 7869652981 is about 88711.0645917408. The cubic root of 7869652981 is about 1989.0782142825.

The spelling of 7869652981 in words is "seven billion, eight hundred sixty-nine million, six hundred fifty-two thousand, nine hundred eighty-one".