197623813401 has 27 divisors (see below), whose sum is σ = 332077468671. Its totient is φ = 112922558784.

The previous prime is 197623813363. The next prime is 197623813411. The reversal of 197623813401 is 104318326791.

The square root of 197623813401 is 444549.

It is a perfect power (a square), and thus also a powerful number.

197623813401 is a `hidden beast` number, since 1 + 9 + 7 + 6 + 238 + 1 + 3 + 401 = 666.

It can be written as a sum of positive squares in only one way, i.e., 192283127001 + 5340686400 = 438501^2 + 73080^2 .

It is not a de Polignac number, because 197623813401 - 2¹¹ = 197623811353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197623813411) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9324945 + ... + 9346113.

Almost surely, 2^197623813401 is an apocalyptic number.

197623813401 is the 444549-th square number.

197623813401 is the 222275-th centered octagonal number.

It is an amenable number.

197623813401 is a deficient number, since it is larger than the sum of its proper divisors (134453655270).

197623813401 is an frugal number, since it uses more digits than its factorization.

197623813401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42358 (or 21179 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 197623813401 in words is "one hundred ninety-seven billion, six hundred twenty-three million, eight hundred thirteen thousand, four hundred one".