197493844 has 12 divisors (see below), whose sum is σ = 351280468. Its totient is φ = 97128000.

The previous prime is 197493781. The next prime is 197493851. The reversal of 197493844 is 448394791.

It can be written as a sum of positive squares in 2 ways, for example, as 71605444 + 125888400 = 8462^2 + 11220^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404457 + ... + 404944.

Almost surely, 2^197493844 is an apocalyptic number.

It is an amenable number.

197493844 is a deficient number, since it is larger than the sum of its proper divisors (153786624).

197493844 is a wasteful number, since it uses less digits than its factorization.

197493844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809466 (or 809464 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The square root of 197493844 is about 14053.2503001975. The cubic root of 197493844 is about 582.3505915812.

The spelling of 197493844 in words is "one hundred ninety-seven million, four hundred ninety-three thousand, eight hundred forty-four".