7977986227 has 2 divisors, whose sum is σ = 7977986228. Its totient is φ = 7977986226.

The previous prime is 7977986201. The next prime is 7977986239. The reversal of 7977986227 is 7226897797.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7977986227 is a prime.

It is not a weakly prime, because it can be changed into another prime (7977986267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3988993113 + 3988993114.

It is an arithmetic number, because the mean of its divisors is an integer number (3988993114).

Almost surely, 2^7977986227 is an apocalyptic number.

7977986227 is a deficient number, since it is larger than the sum of its proper divisors (1).

7977986227 is an equidigital number, since it uses as much as digits as its factorization.

7977986227 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37340352, while the sum is 64.

The square root of 7977986227 is about 89319.5735939217. The cubic root of 7977986227 is about 1998.1638336792.

The spelling of 7977986227 in words is "seven billion, nine hundred seventy-seven million, nine hundred eighty-six thousand, two hundred twenty-seven".