3946105284621 has 4 divisors (see below), whose sum is σ = 5261473712832. Its totient is φ = 2630736856412.

The previous prime is 3946105284581. The next prime is 3946105284631. The reversal of 3946105284621 is 1264825016493.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3946105284621 - 2²³ = 3946096896013 is a prime.

It is a super-2 number, since 2×3946105284621² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3946105284631) 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, 657684214101 + ... + 657684214106.

It is an arithmetic number, because the mean of its divisors is an integer number (1315368428208).

Almost surely, 2^{3946105284621} is an apocalyptic number.

It is an amenable number.

3946105284621 is a deficient number, since it is larger than the sum of its proper divisors (1315368428211).

3946105284621 is a wasteful number, since it uses less digits than its factorization.

3946105284621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315368428210.

The product of its (nonzero) digits is 2488320, while the sum is 51.

The spelling of 3946105284621 in words is "three trillion, nine hundred forty-six billion, one hundred five million, two hundred eighty-four thousand, six hundred twenty-one".