7879971487 has 2 divisors, whose sum is σ = 7879971488. Its totient is φ = 7879971486.

The previous prime is 7879971433. The next prime is 7879971503. The reversal of 7879971487 is 7841799787.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7879971487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7879971287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3939985743 + 3939985744.

It is an arithmetic number, because the mean of its divisors is an integer number (3939985744).

Almost surely, 2^7879971487 is an apocalyptic number.

7879971487 is a deficient number, since it is larger than the sum of its proper divisors (1).

7879971487 is an equidigital number, since it uses as much as digits as its factorization.

7879971487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49787136, while the sum is 67.

The square root of 7879971487 is about 88769.2034829647. The cubic root of 7879971487 is about 1989.9471789722.

The spelling of 7879971487 in words is "seven billion, eight hundred seventy-nine million, nine hundred seventy-one thousand, four hundred eighty-seven".