7897955477 has 2 divisors, whose sum is σ = 7897955478. Its totient is φ = 7897955476.

The previous prime is 7897955423. The next prime is 7897955563. The reversal of 7897955477 is 7745597987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6490880356 + 1407075121 = 80566^2 + 37511^2 .

It is a cyclic number.

It is not a de Polignac number, because 7897955477 - 2⁶ = 7897955413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7897955077) 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, 3948977738 + 3948977739.

It is an arithmetic number, because the mean of its divisors is an integer number (3948977739).

Almost surely, 2^7897955477 is an apocalyptic number.

It is an amenable number.

7897955477 is a deficient number, since it is larger than the sum of its proper divisors (1).

7897955477 is an equidigital number, since it uses as much as digits as its factorization.

7897955477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155584800, while the sum is 68.

The square root of 7897955477 is about 88870.4420884694. The cubic root of 7897955477 is about 1991.4598747859.

The spelling of 7897955477 in words is "seven billion, eight hundred ninety-seven million, nine hundred fifty-five thousand, four hundred seventy-seven".