7129877987 has 2 divisors, whose sum is σ = 7129877988. Its totient is φ = 7129877986.

The previous prime is 7129877977. The next prime is 7129878011. The reversal of 7129877987 is 7897789217.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7129877987 - 2¹⁴ = 7129861603 is a prime.

It is not a weakly prime, because it can be changed into another prime (7129877977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3564938993 + 3564938994.

It is an arithmetic number, because the mean of its divisors is an integer number (3564938994).

Almost surely, 2^7129877987 is an apocalyptic number.

7129877987 is a deficient number, since it is larger than the sum of its proper divisors (1).

7129877987 is an equidigital number, since it uses as much as digits as its factorization.

7129877987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24893568, while the sum is 65.

The square root of 7129877987 is about 84438.6048380715. The cubic root of 7129877987 is about 1924.6895985260.

The spelling of 7129877987 in words is "seven billion, one hundred twenty-nine million, eight hundred seventy-seven thousand, nine hundred eighty-seven".