969396221 has 4 divisors (see below), whose sum is σ = 974317212. Its totient is φ = 964475232.

The previous prime is 969396209. The next prime is 969396223. The reversal of 969396221 is 122693969.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122693969 = 9013 ⋅13613.

It can be written as a sum of positive squares in 2 ways, for example, as 742562500 + 226833721 = 27250^2 + 15061^2 .

It is a cyclic number.

It is not a de Polignac number, because 969396221 - 2¹⁸ = 969134077 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 (969396223) 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, 2460200 + ... + 2460593.

It is an arithmetic number, because the mean of its divisors is an integer number (243579303).

Almost surely, 2^969396221 is an apocalyptic number.

It is an amenable number.

969396221 is a deficient number, since it is larger than the sum of its proper divisors (4920991).

969396221 is a wasteful number, since it uses less digits than its factorization.

969396221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4920990.

The product of its digits is 314928, while the sum is 47.

The square root of 969396221 is about 31135.1284082786. The cubic root of 969396221 is about 989.6928683704.

The spelling of 969396221 in words is "nine hundred sixty-nine million, three hundred ninety-six thousand, two hundred twenty-one".