197722971 has 16 divisors (see below), whose sum is σ = 310154400. Its totient is φ = 124061184.

The previous prime is 197722969. The next prime is 197722979. The reversal of 197722971 is 179227791.

It is a happy number.

197722971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 197722971 - 2¹ = 197722969 is a prime.

It is a super-2 number, since 2×197722971² = 78188746522133682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (197722979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214926 + ... + 215843.

It is an arithmetic number, because the mean of its divisors is an integer number (19384650).

Almost surely, 2^197722971 is an apocalyptic number.

197722971 is a deficient number, since it is larger than the sum of its proper divisors (112431429).

197722971 is a wasteful number, since it uses less digits than its factorization.

197722971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430795 (or 430789 counting only the distinct ones).

The product of its digits is 111132, while the sum is 45.

The square root of 197722971 is about 14061.4000369807. The cubic root of 197722971 is about 582.5757136627.

The spelling of 197722971 in words is "one hundred ninety-seven million, seven hundred twenty-two thousand, nine hundred seventy-one".