10142399987 has 4 divisors (see below), whose sum is σ = 10149479160. Its totient is φ = 10135320816.

The previous prime is 10142399977. The next prime is 10142399989. The reversal of 10142399987 is 78999324101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10142399987 - 2⁶ = 10142399923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10142399989) 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 in 3 ways as a sum of consecutive naturals, for example, 3537437 + ... + 3540302.

It is an arithmetic number, because the mean of its divisors is an integer number (2537369790).

Almost surely, 2^10142399987 is an apocalyptic number.

10142399987 is a deficient number, since it is larger than the sum of its proper divisors (7079173).

10142399987 is an equidigital number, since it uses as much as digits as its factorization.

10142399987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7079172.

The product of its (nonzero) digits is 979776, while the sum is 53.

The spelling of 10142399987 in words is "ten billion, one hundred forty-two million, three hundred ninety-nine thousand, nine hundred eighty-seven".