978121412 has 6 divisors (see below), whose sum is σ = 1711712478. Its totient is φ = 489060704.

The previous prime is 978121373. The next prime is 978121429. The reversal of 978121412 is 214121879.

978121412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 741146176 + 236975236 = 27224^2 + 15394^2 .

It is a super-2 number, since 2×978121412² = 1913442993225747488, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122265173 + ... + 122265180.

It is an arithmetic number, because the mean of its divisors is an integer number (285285413).

Almost surely, 2^978121412 is an apocalyptic number.

It is an amenable number.

978121412 is a deficient number, since it is larger than the sum of its proper divisors (733591066).

978121412 is a wasteful number, since it uses less digits than its factorization.

978121412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244530357 (or 244530355 counting only the distinct ones).

The product of its digits is 8064, while the sum is 35.

The square root of 978121412 is about 31274.9326458108. The cubic root of 978121412 is about 992.6532954427.

The spelling of 978121412 in words is "nine hundred seventy-eight million, one hundred twenty-one thousand, four hundred twelve".