3573253721 has 2 divisors, whose sum is σ = 3573253722. Its totient is φ = 3573253720.

The previous prime is 3573253643. The next prime is 3573253729. The reversal of 3573253721 is 1273523753.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2941435225 + 631818496 = 54235^2 + 25136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3573253721 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3573253729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1786626860 + 1786626861.

It is an arithmetic number, because the mean of its divisors is an integer number (1786626861).

Almost surely, 2^3573253721 is an apocalyptic number.

It is an amenable number.

3573253721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3573253721 is an equidigital number, since it uses as much as digits as its factorization.

3573253721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132300, while the sum is 38.

The square root of 3573253721 is about 59776.6988131663. The cubic root of 3573253721 is about 1528.8138842800.

The spelling of 3573253721 in words is "three billion, five hundred seventy-three million, two hundred fifty-three thousand, seven hundred twenty-one".