197312957 has 4 divisors (see below), whose sum is σ = 197462976. Its totient is φ = 197162940.

The previous prime is 197312881. The next prime is 197312963. The reversal of 197312957 is 759213791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 197312957 - 2¹² = 197308861 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 (197312257) 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, 73019 + ... + 75672.

It is an arithmetic number, because the mean of its divisors is an integer number (49365744).

Almost surely, 2^197312957 is an apocalyptic number.

It is an amenable number.

197312957 is a deficient number, since it is larger than the sum of its proper divisors (150019).

197312957 is a wasteful number, since it uses less digits than its factorization.

197312957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150018.

The product of its digits is 119070, while the sum is 44.

The square root of 197312957 is about 14046.8130549246. The cubic root of 197312957 is about 582.1727432893.

The spelling of 197312957 in words is "one hundred ninety-seven million, three hundred twelve thousand, nine hundred fifty-seven".