7023161721 has 8 divisors (see below), whose sum is σ = 9366069664. Its totient is φ = 4681180800.

The previous prime is 7023161683. The next prime is 7023161723. The reversal of 7023161721 is 1271613207.

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

It is not a de Polignac number, because 7023161721 - 2⁹ = 7023161209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7023161723) 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, 213880 + ... + 244521.

It is an arithmetic number, because the mean of its divisors is an integer number (1170758708).

Almost surely, 2^7023161721 is an apocalyptic number.

It is an amenable number.

7023161721 is a deficient number, since it is larger than the sum of its proper divisors (2342907943).

7023161721 is a wasteful number, since it uses less digits than its factorization.

7023161721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463511.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 7023161721 is about 83804.3061005817. The cubic root of 7023161721 is about 1915.0387065963.

Adding to 7023161721 its reverse (1271613207), we get a palindrome (8294774928).

The spelling of 7023161721 in words is "seven billion, twenty-three million, one hundred sixty-one thousand, seven hundred twenty-one".