5209986 has 8 divisors (see below), whose sum is σ = 10419984. Its totient is φ = 1736660.

The previous prime is 5209957. The next prime is 5209999. The reversal of 5209986 is 6899025.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

5209986 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434160 + ... + 434171.

It is an arithmetic number, because the mean of its divisors is an integer number (1302498).

Almost surely, 2^5209986 is an apocalyptic number.

5209986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5209986 is a wasteful number, since it uses less digits than its factorization.

5209986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868336.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 5209986 is about 2282.5393753449. The cubic root of 5209986 is about 173.3586509698.

The spelling of 5209986 in words is "five million, two hundred nine thousand, nine hundred eighty-six".