3623721973 has 2 divisors, whose sum is σ = 3623721974. Its totient is φ = 3623721972.

The previous prime is 3623721859. The next prime is 3623721979. The reversal of 3623721973 is 3791273263.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2125025604 + 1498696369 = 46098^2 + 38713^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3623721973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3623721979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1811860986 + 1811860987.

It is an arithmetic number, because the mean of its divisors is an integer number (1811860987).

Almost surely, 2^3623721973 is an apocalyptic number.

It is an amenable number.

3623721973 is a deficient number, since it is larger than the sum of its proper divisors (1).

3623721973 is an equidigital number, since it uses as much as digits as its factorization.

3623721973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 43.

The square root of 3623721973 is about 60197.3585217823. The cubic root of 3623721973 is about 1535.9778627101.

The spelling of 3623721973 in words is "three billion, six hundred twenty-three million, seven hundred twenty-one thousand, nine hundred seventy-three".