3312998721 has 12 divisors (see below), whose sum is σ = 4786533648. Its totient is φ = 2208162264.

The previous prime is 3312998699. The next prime is 3312998723. The reversal of 3312998721 is 1278992133.

3312998721 is a `hidden beast` number, since 331 + 299 + 8 + 7 + 21 = 666.

It is not a de Polignac number, because 3312998721 - 2¹³ = 3312990529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3312998723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2146 + ... + 81428.

It is an arithmetic number, because the mean of its divisors is an integer number (398877804).

Almost surely, 2^3312998721 is an apocalyptic number.

It is an amenable number.

3312998721 is a deficient number, since it is larger than the sum of its proper divisors (1473534927).

3312998721 is a wasteful number, since it uses less digits than its factorization.

3312998721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83932 (or 83929 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 3312998721 is about 57558.6546142281. The cubic root of 3312998721 is about 1490.7577967420.

The spelling of 3312998721 in words is "three billion, three hundred twelve million, nine hundred ninety-eight thousand, seven hundred twenty-one".