167821412 has 12 divisors (see below), whose sum is σ = 320386416. Its totient is φ = 76282440.

The previous prime is 167821403. The next prime is 167821417. The reversal of 167821412 is 214128761.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (167821417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1907018 + ... + 1907105.

It is an arithmetic number, because the mean of its divisors is an integer number (26698868).

Almost surely, 2^167821412 is an apocalyptic number.

It is an amenable number.

167821412 is a deficient number, since it is larger than the sum of its proper divisors (152565004).

167821412 is a wasteful number, since it uses less digits than its factorization.

167821412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3814138 (or 3814136 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 167821412 is about 12954.5903833352. The cubic root of 167821412 is about 551.5892458152.

The spelling of 167821412 in words is "one hundred sixty-seven million, eight hundred twenty-one thousand, four hundred twelve".