6139970987 has 2 divisors, whose sum is σ = 6139970988. Its totient is φ = 6139970986.

The previous prime is 6139970959. The next prime is 6139971023. The reversal of 6139970987 is 7890799316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6139970987 - 2⁶ = 6139970923 is a prime.

It is not a weakly prime, because it can be changed into another prime (6139970687) 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, 3069985493 + 3069985494.

It is an arithmetic number, because the mean of its divisors is an integer number (3069985494).

Almost surely, 2^6139970987 is an apocalyptic number.

6139970987 is a deficient number, since it is larger than the sum of its proper divisors (1).

6139970987 is an equidigital number, since it uses as much as digits as its factorization.

6139970987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5143824, while the sum is 59.

The square root of 6139970987 is about 78357.9669657145. The cubic root of 6139970987 is about 1831.1423473671.

The spelling of 6139970987 in words is "six billion, one hundred thirty-nine million, nine hundred seventy thousand, nine hundred eighty-seven".