197631242 has 4 divisors (see below), whose sum is σ = 296446866. Its totient is φ = 98815620.

The previous prime is 197631241. The next prime is 197631253. The reversal of 197631242 is 242136791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242136791 = 13 ⋅18625907.

It can be written as a sum of positive squares in only one way, i.e., 150283081 + 47348161 = 12259^2 + 6881^2 .

It is not an unprimeable number, because it can be changed into a prime (197631241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49407809 + ... + 49407812.

Almost surely, 2^197631242 is an apocalyptic number.

197631242 is a deficient number, since it is larger than the sum of its proper divisors (98815624).

197631242 is an equidigital number, since it uses as much as digits as its factorization.

197631242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98815623.

The product of its digits is 18144, while the sum is 35.

The square root of 197631242 is about 14058.1379279050. The cubic root of 197631242 is about 582.4856088839.

The spelling of 197631242 in words is "one hundred ninety-seven million, six hundred thirty-one thousand, two hundred forty-two".