3947474159501 has 4 divisors (see below), whose sum is σ = 3947478477852. Its totient is φ = 3947469841152.

The previous prime is 3947474159483. The next prime is 3947474159513. The reversal of 3947474159501 is 1059514747493.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 564354025225 + 3383120134276 = 751235^2 + 1839326^2 .

It is a cyclic number.

It is not a de Polignac number, because 3947474159501 - 2⁶ = 3947474159437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947474155501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188390 + ... + 2816103.

It is an arithmetic number, because the mean of its divisors is an integer number (986869619463).

Almost surely, 2^{3947474159501} is an apocalyptic number.

It is an amenable number.

3947474159501 is a deficient number, since it is larger than the sum of its proper divisors (4318351).

3947474159501 is a wasteful number, since it uses less digits than its factorization.

3947474159501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4318350.

The product of its (nonzero) digits is 19051200, while the sum is 59.

The spelling of 3947474159501 in words is "three trillion, nine hundred forty-seven billion, four hundred seventy-four million, one hundred fifty-nine thousand, five hundred one".