197720456 has 16 divisors (see below), whose sum is σ = 370907100. Its totient is φ = 98811904.

The previous prime is 197720437. The next prime is 197720461. The reversal of 197720456 is 654027791.

197720456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 180364900 + 17355556 = 13430^2 + 4166^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16136 + ... + 25608.

Almost surely, 2^197720456 is an apocalyptic number.

It is an amenable number.

197720456 is a deficient number, since it is larger than the sum of its proper divisors (173186644).

197720456 is a wasteful number, since it uses less digits than its factorization.

197720456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12088 (or 12084 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 197720456 is about 14061.3106074789. The cubic root of 197720456 is about 582.5732435668.

The spelling of 197720456 in words is "one hundred ninety-seven million, seven hundred twenty thousand, four hundred fifty-six".