7961772697 has 2 divisors, whose sum is σ = 7961772698. Its totient is φ = 7961772696.

The previous prime is 7961772677. The next prime is 7961772701. The reversal of 7961772697 is 7962771697.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5151076441 + 2810696256 = 71771^2 + 53016^2 .

It is an emirp because it is prime and its reverse (7962771697) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7961772697 - 2³¹ = 5814289049 is a prime.

It is not a weakly prime, because it can be changed into another prime (7961772677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3980886348 + 3980886349.

It is an arithmetic number, because the mean of its divisors is an integer number (3980886349).

Almost surely, 2^7961772697 is an apocalyptic number.

It is an amenable number.

7961772697 is a deficient number, since it is larger than the sum of its proper divisors (1).

7961772697 is an equidigital number, since it uses as much as digits as its factorization.

7961772697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14002632, while the sum is 61.

The square root of 7961772697 is about 89228.7660847106. The cubic root of 7961772697 is about 1996.8093038526.

The spelling of 7961772697 in words is "seven billion, nine hundred sixty-one million, seven hundred seventy-two thousand, six hundred ninety-seven".