3744727621 has 2 divisors, whose sum is σ = 3744727622. Its totient is φ = 3744727620.

The previous prime is 3744727603. The next prime is 3744727639. The reversal of 3744727621 is 1267274473.

It is a balanced prime because it is at equal distance from previous prime (3744727603) and next prime (3744727639).

It can be written as a sum of positive squares in only one way, i.e., 3444398721 + 300328900 = 58689^2 + 17330^2 .

It is an emirp because it is prime and its reverse (1267274473) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3744727621 - 2¹¹ = 3744725573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3744727601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1872363810 + 1872363811.

It is an arithmetic number, because the mean of its divisors is an integer number (1872363811).

Almost surely, 2^3744727621 is an apocalyptic number.

It is an amenable number.

3744727621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3744727621 is an equidigital number, since it uses as much as digits as its factorization.

3744727621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 43.

The square root of 3744727621 is about 61194.1796333606. The cubic root of 3744727621 is about 1552.8878000359.

The spelling of 3744727621 in words is "three billion, seven hundred forty-four million, seven hundred twenty-seven thousand, six hundred twenty-one".