197434805 has 8 divisors (see below), whose sum is σ = 241392312. Its totient is φ = 154967488.

The previous prime is 197434799. The next prime is 197434807. The reversal of 197434805 is 508434791.

It can be written as a sum of positive squares in 4 ways, for example, as 15697444 + 181737361 = 3962^2 + 13481^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197434805 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197434807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372254 + ... + 372783.

It is an arithmetic number, because the mean of its divisors is an integer number (30174039).

Almost surely, 2^197434805 is an apocalyptic number.

It is an amenable number.

197434805 is a deficient number, since it is larger than the sum of its proper divisors (43957507).

197434805 is an equidigital number, since it uses as much as digits as its factorization.

197434805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745095.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 197434805 is about 14051.1495970970. The cubic root of 197434805 is about 582.2925563155.

The spelling of 197434805 in words is "one hundred ninety-seven million, four hundred thirty-four thousand, eight hundred five".