7690799981 has 2 divisors, whose sum is σ = 7690799982. Its totient is φ = 7690799980.

The previous prime is 7690799957. The next prime is 7690800023. The reversal of 7690799981 is 1899970967.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4760310025 + 2930489956 = 68995^2 + 54134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7690799981 is a prime.

It is a super-2 number, since 2×7690799981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7690799911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3845399990 + 3845399991.

It is an arithmetic number, because the mean of its divisors is an integer number (3845399991).

Almost surely, 2^7690799981 is an apocalyptic number.

It is an amenable number.

7690799981 is a deficient number, since it is larger than the sum of its proper divisors (1).

7690799981 is an equidigital number, since it uses as much as digits as its factorization.

7690799981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15431472, while the sum is 65.

The square root of 7690799981 is about 87697.2062325819. The cubic root of 7690799981 is about 1973.8940541913.

The spelling of 7690799981 in words is "seven billion, six hundred ninety million, seven hundred ninety-nine thousand, nine hundred eighty-one".