197427643 has 4 divisors (see below), whose sum is σ = 225631600. Its totient is φ = 169223688.

The previous prime is 197427599. The next prime is 197427661. The reversal of 197427643 is 346724791.

197427643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346724791 = 7 ⋅49532113.

It is a cyclic number.

It is not a de Polignac number, because 197427643 - 2¹³ = 197419451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 197427643.

It is not an unprimeable number, because it can be changed into a prime (197428643) 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, 14101968 + ... + 14101981.

It is an arithmetic number, because the mean of its divisors is an integer number (56407900).

Almost surely, 2^197427643 is an apocalyptic number.

197427643 is a deficient number, since it is larger than the sum of its proper divisors (28203957).

197427643 is an equidigital number, since it uses as much as digits as its factorization.

197427643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28203956.

The product of its digits is 254016, while the sum is 43.

The square root of 197427643 is about 14050.8947401936. The cubic root of 197427643 is about 582.2855152913.

The spelling of 197427643 in words is "one hundred ninety-seven million, four hundred twenty-seven thousand, six hundred forty-three".