673564986 has 24 divisors (see below), whose sum is σ = 1493331840. Its totient is φ = 219299976.

The previous prime is 673564979. The next prime is 673564999. The reversal of 673564986 is 689465376.

673564986 is a `hidden beast` number, since 6 + 73 + 564 + 9 + 8 + 6 = 666.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 434346 + ... + 435893.

It is an arithmetic number, because the mean of its divisors is an integer number (62222160).

Almost surely, 2^673564986 is an apocalyptic number.

673564986 is an abundant number, since it is smaller than the sum of its proper divisors (819766854).

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

673564986 is a wasteful number, since it uses less digits than its factorization.

673564986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870290 (or 870287 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The square root of 673564986 is about 25953.1305626123. The cubic root of 673564986 is about 876.5832498486.

The spelling of 673564986 in words is "six hundred seventy-three million, five hundred sixty-four thousand, nine hundred eighty-six".