197672381 has 8 divisors (see below), whose sum is σ = 204645720. Its totient is φ = 190709568.

The previous prime is 197672353. The next prime is 197672383. The reversal of 197672381 is 183276791.

It can be written as a sum of positive squares in 4 ways, for example, as 101828281 + 95844100 = 10091^2 + 9790^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-197672381 is a prime.

It is a super-2 number, since 2×197672381² = 78148740420418322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197672383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69275 + ... + 72071.

It is an arithmetic number, because the mean of its divisors is an integer number (25580715).

Almost surely, 2^197672381 is an apocalyptic number.

It is an amenable number.

197672381 is a deficient number, since it is larger than the sum of its proper divisors (6973339).

197672381 is a wasteful number, since it uses less digits than its factorization.

197672381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5263.

The product of its digits is 127008, while the sum is 44.

The square root of 197672381 is about 14059.6010256337. The cubic root of 197672381 is about 582.5260228939.

The spelling of 197672381 in words is "one hundred ninety-seven million, six hundred seventy-two thousand, three hundred eighty-one".