946670221 has 4 divisors (see below), whose sum is σ = 1081908832. Its totient is φ = 811431612.

The previous prime is 946670191. The next prime is 946670227. The reversal of 946670221 is 122076649.

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 946670221 - 2⁷ = 946670093 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 (946670227) 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, 67619295 + ... + 67619308.

It is an arithmetic number, because the mean of its divisors is an integer number (270477208).

Almost surely, 2^946670221 is an apocalyptic number.

It is an amenable number.

946670221 is a deficient number, since it is larger than the sum of its proper divisors (135238611).

946670221 is a wasteful number, since it uses less digits than its factorization.

946670221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135238610.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 946670221 is about 30768.0064515074. The cubic root of 946670221 is about 981.8976907363.

The spelling of 946670221 in words is "nine hundred forty-six million, six hundred seventy thousand, two hundred twenty-one".