197631349 has 4 divisors (see below), whose sum is σ = 197710560. Its totient is φ = 197552140.

The previous prime is 197631337. The next prime is 197631373. The reversal of 197631349 is 943136791.

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 197631349 - 2²¹ = 195534197 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 (197631949) 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, 35737 + ... + 40894.

It is an arithmetic number, because the mean of its divisors is an integer number (49427640).

Almost surely, 2^197631349 is an apocalyptic number.

It is an amenable number.

197631349 is a deficient number, since it is larger than the sum of its proper divisors (79211).

197631349 is an equidigital number, since it uses as much as digits as its factorization.

197631349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79210.

The product of its digits is 122472, while the sum is 43.

The square root of 197631349 is about 14058.1417335294. The cubic root of 197631349 is about 582.4857140055.

It can be divided in two parts, 19763 and 1349, that added together give a palindrome (21112).

The spelling of 197631349 in words is "one hundred ninety-seven million, six hundred thirty-one thousand, three hundred forty-nine".