39898623489 has 4 divisors (see below), whose sum is σ = 53198164656. Its totient is φ = 26599082324.

The previous prime is 39898623451. The next prime is 39898623497. The reversal of 39898623489 is 98432689893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39898623489 - 2⁹ = 39898622977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39898624489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6649770579 + ... + 6649770584.

It is an arithmetic number, because the mean of its divisors is an integer number (13299541164).

Almost surely, 2^39898623489 is an apocalyptic number.

It is an amenable number.

39898623489 is a deficient number, since it is larger than the sum of its proper divisors (13299541167).

39898623489 is a wasteful number, since it uses less digits than its factorization.

39898623489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13299541166.

The product of its digits is 161243136, while the sum is 69.

The spelling of 39898623489 in words is "thirty-nine billion, eight hundred ninety-eight million, six hundred twenty-three thousand, four hundred eighty-nine".