3947121730601 has 64 divisors (see below), whose sum is σ = 5053728153600. Its totient is φ = 3004780686336.

The previous prime is 3947121730597. The next prime is 3947121730603. The reversal of 3947121730601 is 1060371217493.

It is a cyclic number.

It is not a de Polignac number, because 3947121730601 - 2² = 3947121730597 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3947121730603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 158385620 + ... + 158410538.

It is an arithmetic number, because the mean of its divisors is an integer number (78964502400).

Almost surely, 2^{3947121730601} is an apocalyptic number.

It is an amenable number.

3947121730601 is a deficient number, since it is larger than the sum of its proper divisors (1106606422999).

3947121730601 is a wasteful number, since it uses less digits than its factorization.

3947121730601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25998.

The product of its (nonzero) digits is 190512, while the sum is 44.

The spelling of 3947121730601 in words is "three trillion, nine hundred forty-seven billion, one hundred twenty-one million, seven hundred thirty thousand, six hundred one".