489209973987 has 64 divisors (see below), whose sum is σ = 780308250624. Its totient is φ = 266559258240.

The previous prime is 489209973983. The next prime is 489209974003. The reversal of 489209973987 is 789379902984.

It is not a de Polignac number, because 489209973987 - 2² = 489209973983 is a prime.

It is a super-2 number, since 2×489209973987² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (489209973983) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 312194478 + ... + 312196044.

It is an arithmetic number, because the mean of its divisors is an integer number (12192316416).

Almost surely, 2^489209973987 is an apocalyptic number.

489209973987 is a deficient number, since it is larger than the sum of its proper divisors (291098276637).

489209973987 is a wasteful number, since it uses less digits than its factorization.

489209973987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208.

The product of its (nonzero) digits is 493807104, while the sum is 75.

The spelling of 489209973987 in words is "four hundred eighty-nine billion, two hundred nine million, nine hundred seventy-three thousand, nine hundred eighty-seven".