1979216 has 10 divisors (see below), whose sum is σ = 3834762.
Its totient is φ = 989600.
The previous prime is 1979209. The next prime is 1979227. The reversal of 1979216 is 6129791.
It can be written as a sum of positive squares in only one way, i.e., 1345600 + 633616 = 1160^2 + 796^2
It is a zygodrome in base 7.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61835 + ... + 61866.
21979216 is an apocalyptic number.
1979216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.
It is an amenable number.
1979216 is a deficient number, since it is larger than the sum of its proper divisors (1855546).
1979216 is a wasteful number, since it uses less digits than its factorization.
1979216 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 123709 (or 123703 counting only the distinct ones).
The product of its digits is 6804, while the sum is 35.
The square root of 1979216 is about 1406.8461180954.
The cubic root of 1979216 is about 125.5541477321.
The spelling of 1979216 in words is "one million, nine hundred seventy-nine thousand, two hundred sixteen".