7372543621 has 2 divisors, whose sum is σ = 7372543622. Its totient is φ = 7372543620.

The previous prime is 7372543601. The next prime is 7372543693. The reversal of 7372543621 is 1263452737.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3814421121 + 3558122500 = 61761^2 + 59650^2 .

It is an emirp because it is prime and its reverse (1263452737) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7372543621 - 2¹¹ = 7372541573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7372543601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3686271810 + 3686271811.

It is an arithmetic number, because the mean of its divisors is an integer number (3686271811).

Almost surely, 2^7372543621 is an apocalyptic number.

It is an amenable number.

7372543621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7372543621 is an equidigital number, since it uses as much as digits as its factorization.

7372543621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 40.

The square root of 7372543621 is about 85863.5174040756. The cubic root of 7372543621 is about 1946.2820782979.

The spelling of 7372543621 in words is "seven billion, three hundred seventy-two million, five hundred forty-three thousand, six hundred twenty-one".