3953175162721 has 2 divisors, whose sum is σ = 3953175162722. Its totient is φ = 3953175162720.

The previous prime is 3953175162659. The next prime is 3953175162743. The reversal of 3953175162721 is 1272615713593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3464210615121 + 488964547600 = 1861239^2 + 699260^2 .

It is a cyclic number.

It is not a de Polignac number, because 3953175162721 - 2¹⁹ = 3953174638433 is a prime.

It is not a weakly prime, because it can be changed into another prime (3953175162791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1976587581360 + 1976587581361.

It is an arithmetic number, because the mean of its divisors is an integer number (1976587581361).

Almost surely, 2^{3953175162721} is an apocalyptic number.

It is an amenable number.

3953175162721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3953175162721 is an equidigital number, since it uses as much as digits as its factorization.

3953175162721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2381400, while the sum is 52.

The spelling of 3953175162721 in words is "three trillion, nine hundred fifty-three billion, one hundred seventy-five million, one hundred sixty-two thousand, seven hundred twenty-one".