3990905175629 has 2 divisors, whose sum is σ = 3990905175630. Its totient is φ = 3990905175628.

The previous prime is 3990905175617. The next prime is 3990905175799. The reversal of 3990905175629 is 9265715090993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3990905175625 + 4 = 1997725^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 3990905175629 - 2²⁰ = 3990904127053 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3990905175329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1995452587814 + 1995452587815.

It is an arithmetic number, because the mean of its divisors is an integer number (1995452587815).

Almost surely, 2^{3990905175629} is an apocalyptic number.

It is an amenable number.

3990905175629 is a deficient number, since it is larger than the sum of its proper divisors (1).

3990905175629 is an equidigital number, since it uses as much as digits as its factorization.

3990905175629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41334300, while the sum is 65.

The spelling of 3990905175629 in words is "three trillion, nine hundred ninety billion, nine hundred five million, one hundred seventy-five thousand, six hundred twenty-nine".