197312105 has 8 divisors (see below), whose sum is σ = 238283592. Its totient is φ = 156843648.

The previous prime is 197312099. The next prime is 197312111. The reversal of 197312105 is 501213791.

It is an interprime number because it is at equal distance from previous prime (197312099) and next prime (197312111).

It can be written as a sum of positive squares in 4 ways, for example, as 5683456 + 191628649 = 2384^2 + 13843^2 .

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 197312105 - 2⁶ = 197312041 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124892 + ... + 126461.

It is an arithmetic number, because the mean of its divisors is an integer number (29785449).

Almost surely, 2^197312105 is an apocalyptic number.

It is an amenable number.

197312105 is a deficient number, since it is larger than the sum of its proper divisors (40971487).

197312105 is a wasteful number, since it uses less digits than its factorization.

197312105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251515.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 197312105 is about 14046.7827277281. The cubic root of 197312105 is about 582.1719053449.

Adding to 197312105 its reverse (501213791), we get a palindrome (698525896).

The spelling of 197312105 in words is "one hundred ninety-seven million, three hundred twelve thousand, one hundred five".