673426986 has 16 divisors (see below), whose sum is σ = 1347814944. Its totient is φ = 224315504.

The previous prime is 673426979. The next prime is 673426993. The reversal of 673426986 is 689624376.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (673426979) and next prime (673426993).

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 7 ways as a sum of consecutive naturals, for example, 30765 + ... + 47888.

It is an arithmetic number, because the mean of its divisors is an integer number (84238434).

Almost surely, 2^673426986 is an apocalyptic number.

673426986 is an abundant number, since it is smaller than the sum of its proper divisors (674387958).

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

673426986 is a wasteful number, since it uses less digits than its factorization.

673426986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80085.

The product of its digits is 2612736, while the sum is 51.

The square root of 673426986 is about 25950.4717876188. The cubic root of 673426986 is about 876.5233809653.

The spelling of 673426986 in words is "six hundred seventy-three million, four hundred twenty-six thousand, nine hundred eighty-six".