7977986201 has 2 divisors, whose sum is σ = 7977986202. Its totient is φ = 7977986200.

The previous prime is 7977986197. The next prime is 7977986227. The reversal of 7977986201 is 1026897797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5956134976 + 2021851225 = 77176^2 + 44965^2 .

It is a cyclic number.

It is not a de Polignac number, because 7977986201 - 2² = 7977986197 is a prime.

It is not a weakly prime, because it can be changed into another prime (7977986801) 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, 3988993100 + 3988993101.

It is an arithmetic number, because the mean of its divisors is an integer number (3988993101).

Almost surely, 2^7977986201 is an apocalyptic number.

It is an amenable number.

7977986201 is a deficient number, since it is larger than the sum of its proper divisors (1).

7977986201 is an equidigital number, since it uses as much as digits as its factorization.

7977986201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2667168, while the sum is 56.

The square root of 7977986201 is about 89319.5734483769. The cubic root of 7977986201 is about 1998.1638315085.

The spelling of 7977986201 in words is "seven billion, nine hundred seventy-seven million, nine hundred eighty-six thousand, two hundred one".