197242765 has 4 divisors (see below), whose sum is σ = 236691324. Its totient is φ = 157794208.

The previous prime is 197242753. The next prime is 197242769. The reversal of 197242765 is 567242791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 567242791 = 17 ⋅33367223.

It can be written as a sum of positive squares in 2 ways, for example, as 61496964 + 135745801 = 7842^2 + 11651^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197242765 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 (197242769) 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, 19724272 + ... + 19724281.

It is an arithmetic number, because the mean of its divisors is an integer number (59172831).

Almost surely, 2^197242765 is an apocalyptic number.

It is an amenable number.

197242765 is a deficient number, since it is larger than the sum of its proper divisors (39448559).

197242765 is an equidigital number, since it uses as much as digits as its factorization.

197242765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39448558.

The product of its digits is 211680, while the sum is 43.

The square root of 197242765 is about 14044.3143300056. The cubic root of 197242765 is about 582.1037011672.

The spelling of 197242765 in words is "one hundred ninety-seven million, two hundred forty-two thousand, seven hundred sixty-five".