3471994921 has 2 divisors, whose sum is σ = 3471994922. Its totient is φ = 3471994920.

The previous prime is 3471994919. The next prime is 3471994943. The reversal of 3471994921 is 1294991743.

3471994921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3347895321 + 124099600 = 57861^2 + 11140^2 .

It is an emirp because it is prime and its reverse (1294991743) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3471994921 - 2¹ = 3471994919 is a prime.

Together with 3471994919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3471994991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1735997460 + 1735997461.

It is an arithmetic number, because the mean of its divisors is an integer number (1735997461).

Almost surely, 2^3471994921 is an apocalyptic number.

It is an amenable number.

3471994921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3471994921 is an equidigital number, since it uses as much as digits as its factorization.

3471994921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 49.

The square root of 3471994921 is about 58923.6363524859. The cubic root of 3471994921 is about 1514.2341172739.

The spelling of 3471994921 in words is "three billion, four hundred seventy-one million, nine hundred ninety-four thousand, nine hundred twenty-one".