3212957921 has 4 divisors (see below), whose sum is σ = 3221051412. Its totient is φ = 3204864432.

The previous prime is 3212957827. The next prime is 3212957941. The reversal of 3212957921 is 1297592123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1297592123 = 43 ⋅30176561.

It can be written as a sum of positive squares in 2 ways, for example, as 2834071696 + 378886225 = 53236^2 + 19465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3212957921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3212957941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4046150 + ... + 4046943.

It is an arithmetic number, because the mean of its divisors is an integer number (805262853).

Almost surely, 2^3212957921 is an apocalyptic number.

It is an amenable number.

3212957921 is a deficient number, since it is larger than the sum of its proper divisors (8093491).

3212957921 is an equidigital number, since it uses as much as digits as its factorization.

3212957921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8093490.

The product of its digits is 68040, while the sum is 41.

The square root of 3212957921 is about 56682.9597057176. The cubic root of 3212957921 is about 1475.5989785624.

The spelling of 3212957921 in words is "three billion, two hundred twelve million, nine hundred fifty-seven thousand, nine hundred twenty-one".