7691894897 has 2 divisors, whose sum is σ = 7691894898. Its totient is φ = 7691894896.

The previous prime is 7691894759. The next prime is 7691894921. The reversal of 7691894897 is 7984981967.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5472448576 + 2219446321 = 73976^2 + 47111^2 .

It is a cyclic number.

It is not a de Polignac number, because 7691894897 - 2⁸ = 7691894641 is a prime.

It is not a weakly prime, because it can be changed into another prime (7691894297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3845947448 + 3845947449.

It is an arithmetic number, because the mean of its divisors is an integer number (3845947449).

Almost surely, 2^7691894897 is an apocalyptic number.

It is an amenable number.

7691894897 is a deficient number, since it is larger than the sum of its proper divisors (1).

7691894897 is an equidigital number, since it uses as much as digits as its factorization.

7691894897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54867456, while the sum is 68.

The square root of 7691894897 is about 87703.4486038035. The cubic root of 7691894897 is about 1973.9877221943.

The spelling of 7691894897 in words is "seven billion, six hundred ninety-one million, eight hundred ninety-four thousand, eight hundred ninety-seven".