4297691721 has 8 divisors (see below), whose sum is σ = 5732123040. Its totient is φ = 2864194112.

The previous prime is 4297691689. The next prime is 4297691771. The reversal of 4297691721 is 1271967924.

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 4297691721 - 2⁵ = 4297691689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4297691771) 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, 222615 + ... + 241148.

It is an arithmetic number, because the mean of its divisors is an integer number (716515380).

Almost surely, 2^4297691721 is an apocalyptic number.

It is an amenable number.

4297691721 is a deficient number, since it is larger than the sum of its proper divisors (1434431319).

4297691721 is a wasteful number, since it uses less digits than its factorization.

4297691721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466855.

The product of its digits is 381024, while the sum is 48.

The square root of 4297691721 is about 65556.7824179924. The cubic root of 4297691721 is about 1625.8423052240.

The spelling of 4297691721 in words is "four billion, two hundred ninety-seven million, six hundred ninety-one thousand, seven hundred twenty-one".