3974536732609 has 2 divisors, whose sum is σ = 3974536732610. Its totient is φ = 3974536732608.

The previous prime is 3974536732553. The next prime is 3974536732717. The reversal of 3974536732609 is 9062376354793.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2713587406209 + 1260949326400 = 1647297^2 + 1122920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3974536732609 is a prime.

It is not a weakly prime, because it can be changed into another prime (3974536730609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1987268366304 + 1987268366305.

It is an arithmetic number, because the mean of its divisors is an integer number (1987268366305).

Almost surely, 2^{3974536732609} is an apocalyptic number.

It is an amenable number.

3974536732609 is a deficient number, since it is larger than the sum of its proper divisors (1).

3974536732609 is an equidigital number, since it uses as much as digits as its factorization.

3974536732609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 154314720, while the sum is 64.

The spelling of 3974536732609 in words is "three trillion, nine hundred seventy-four billion, five hundred thirty-six million, seven hundred thirty-two thousand, six hundred nine".