5729921921 has 8 divisors (see below), whose sum is σ = 5915743488. Its totient is φ = 5544162000.

The previous prime is 5729921917. The next prime is 5729921929. The reversal of 5729921921 is 1291299275.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5729921921 - 2² = 5729921917 is a prime.

It is a super-3 number, since 3×5729921921³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5729921929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241991 + ... + 264611.

It is an arithmetic number, because the mean of its divisors is an integer number (739467936).

Almost surely, 2^5729921921 is an apocalyptic number.

It is an amenable number.

5729921921 is a deficient number, since it is larger than the sum of its proper divisors (185821567).

5729921921 is a wasteful number, since it uses less digits than its factorization.

5729921921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30823.

The product of its digits is 204120, while the sum is 47.

The square root of 5729921921 is about 75696.2477339531. The cubic root of 5729921921 is about 1789.4362654735.

The spelling of 5729921921 in words is "five billion, seven hundred twenty-nine million, nine hundred twenty-one thousand, nine hundred twenty-one".