4319812921 has 4 divisors (see below), whose sum is σ = 4320838144. Its totient is φ = 4318787700.

The previous prime is 4319812883. The next prime is 4319812933. The reversal of 4319812921 is 1292189134.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 4319812921 - 2⁷ = 4319812793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4319842921) 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, 506265 + ... + 514726.

It is an arithmetic number, because the mean of its divisors is an integer number (1080209536).

Almost surely, 2^4319812921 is an apocalyptic number.

It is an amenable number.

4319812921 is a deficient number, since it is larger than the sum of its proper divisors (1025223).

4319812921 is a wasteful number, since it uses less digits than its factorization.

4319812921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025222.

The product of its digits is 31104, while the sum is 40.

The square root of 4319812921 is about 65725.2837270407. The cubic root of 4319812921 is about 1628.6270598707.

The spelling of 4319812921 in words is "four billion, three hundred nineteen million, eight hundred twelve thousand, nine hundred twenty-one".