39986801089 has 3 divisors (see below), whose sum is σ = 39987001057. Its totient is φ = 39986601122.

The previous prime is 39986801077. The next prime is 39986801201. The reversal of 39986801089 is 98010868993.

The square root of 39986801089 is 199967.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98010868993 = 257 ⋅381365249.

It is not a de Polignac number, because 39986801089 - 2⁷ = 39986800961 is a prime.

It is a super-2 number, since 2×39986801089² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39986801059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 99984 + ... + 299950.

Almost surely, 2^39986801089 is an apocalyptic number.

39986801089 is the 199967-th square number.

39986801089 is the 99984-th centered octagonal number.

It is an amenable number.

39986801089 is a deficient number, since it is larger than the sum of its proper divisors (199968).

39986801089 is an frugal number, since it uses more digits than its factorization.

39986801089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399934 (or 199967 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 61.

The spelling of 39986801089 in words is "thirty-nine billion, nine hundred eighty-six million, eight hundred one thousand, eighty-nine".