10439663987 has 4 divisors (see below), whose sum is σ = 10440702576. Its totient is φ = 10438625400.

The previous prime is 10439663951. The next prime is 10439664031. The reversal of 10439663987 is 78936693401.

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 10439663987 - 2¹⁰ = 10439662963 is a prime.

It is a super-2 number, since 2×10439663987² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10439663917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504068 + ... + 524369.

It is an arithmetic number, because the mean of its divisors is an integer number (2610175644).

Almost surely, 2^10439663987 is an apocalyptic number.

10439663987 is a deficient number, since it is larger than the sum of its proper divisors (1038589).

10439663987 is a wasteful number, since it uses less digits than its factorization.

10439663987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038588.

The product of its (nonzero) digits is 5878656, while the sum is 56.

The spelling of 10439663987 in words is "ten billion, four hundred thirty-nine million, six hundred sixty-three thousand, nine hundred eighty-seven".