3216920673 has 4 divisors (see below), whose sum is σ = 4289227568. Its totient is φ = 2144613780.

The previous prime is 3216920669. The next prime is 3216920699. The reversal of 3216920673 is 3760296123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3216920673 - 2² = 3216920669 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3216920573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536153443 + ... + 536153448.

It is an arithmetic number, because the mean of its divisors is an integer number (1072306892).

Almost surely, 2^3216920673 is an apocalyptic number.

It is an amenable number.

3216920673 is a deficient number, since it is larger than the sum of its proper divisors (1072306895).

3216920673 is a wasteful number, since it uses less digits than its factorization.

3216920673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072306894.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 3216920673 is about 56717.9043424561. The cubic root of 3216920673 is about 1476.2053803667.

The spelling of 3216920673 in words is "three billion, two hundred sixteen million, nine hundred twenty thousand, six hundred seventy-three".