10099979987 has 2 divisors, whose sum is σ = 10099979988. Its totient is φ = 10099979986.

The previous prime is 10099979983. The next prime is 10099979999. The reversal of 10099979987 is 78997999001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10099979987 - 2² = 10099979983 is a prime.

It is not a weakly prime, because it can be changed into another prime (10099979983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5049989993 + 5049989994.

It is an arithmetic number, because the mean of its divisors is an integer number (5049989994).

Almost surely, 2^10099979987 is an apocalyptic number.

10099979987 is a deficient number, since it is larger than the sum of its proper divisors (1).

10099979987 is an equidigital number, since it uses as much as digits as its factorization.

10099979987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23147208, while the sum is 68.

The spelling of 10099979987 in words is "ten billion, ninety-nine million, nine hundred seventy-nine thousand, nine hundred eighty-seven".