197642653 has 8 divisors (see below), whose sum is σ = 213053400. Its totient is φ = 182261568.

The previous prime is 197642651. The next prime is 197642681. The reversal of 197642653 is 356246791.

It can be written as a sum of positive squares in 4 ways, for example, as 1026169 + 196616484 = 1013^2 + 14022^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 197642653 - 2¹ = 197642651 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 (197642651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7563 + ... + 21271.

It is an arithmetic number, because the mean of its divisors is an integer number (26631675).

Almost surely, 2^197642653 is an apocalyptic number.

197642653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

197642653 is a deficient number, since it is larger than the sum of its proper divisors (15410747).

197642653 is a wasteful number, since it uses less digits than its factorization.

197642653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14831.

The product of its digits is 272160, while the sum is 43.

The square root of 197642653 is about 14058.5437723827. The cubic root of 197642653 is about 582.4968193506.

The spelling of 197642653 in words is "one hundred ninety-seven million, six hundred forty-two thousand, six hundred fifty-three".