3921919473 has 4 divisors (see below), whose sum is σ = 5229225968. Its totient is φ = 2614612980.

The previous prime is 3921919457. The next prime is 3921919481. The reversal of 3921919473 is 3749191293.

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 3921919473 - 2⁴ = 3921919457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3921919453) 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, 653653243 + ... + 653653248.

It is an arithmetic number, because the mean of its divisors is an integer number (1307306492).

Almost surely, 2^3921919473 is an apocalyptic number.

It is an amenable number.

3921919473 is a deficient number, since it is larger than the sum of its proper divisors (1307306495).

3921919473 is a wasteful number, since it uses less digits than its factorization.

3921919473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307306494.

The product of its digits is 367416, while the sum is 48.

The square root of 3921919473 is about 62625.2303229298. The cubic root of 3921919473 is about 1577.0043480548.

The spelling of 3921919473 in words is "three billion, nine hundred twenty-one million, nine hundred nineteen thousand, four hundred seventy-three".