7352723621 has 4 divisors (see below), whose sum is σ = 7353866700. Its totient is φ = 7351580544.

The previous prime is 7352723611. The next prime is 7352723641. The reversal of 7352723621 is 1263272537.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1160764900 + 6191958721 = 34070^2 + 78689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7352723621 is a prime.

It is a super-2 number, since 2×7352723621² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7352723611) 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, 561836 + ... + 574773.

It is an arithmetic number, because the mean of its divisors is an integer number (1838466675).

Almost surely, 2^7352723621 is an apocalyptic number.

It is an amenable number.

7352723621 is a deficient number, since it is larger than the sum of its proper divisors (1143079).

7352723621 is a wasteful number, since it uses less digits than its factorization.

7352723621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143078.

The product of its digits is 105840, while the sum is 38.

The square root of 7352723621 is about 85748.0240063875. The cubic root of 7352723621 is about 1944.5364152669.

The spelling of 7352723621 in words is "seven billion, three hundred fifty-two million, seven hundred twenty-three thousand, six hundred twenty-one".