197891396 has 6 divisors (see below), whose sum is σ = 346309950. Its totient is φ = 98945696.

The previous prime is 197891303. The next prime is 197891417. The reversal of 197891396 is 693198791.

197891396 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 182790400 + 15100996 = 13520^2 + 3886^2 .

It is a super-2 number, since 2×197891396² = 78322009221657632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24736421 + ... + 24736428.

It is an arithmetic number, because the mean of its divisors is an integer number (57718325).

Almost surely, 2^197891396 is an apocalyptic number.

It is an amenable number.

197891396 is a deficient number, since it is larger than the sum of its proper divisors (148418554).

197891396 is a wasteful number, since it uses less digits than its factorization.

197891396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49472853 (or 49472851 counting only the distinct ones).

The product of its digits is 734832, while the sum is 53.

The square root of 197891396 is about 14067.3876750447. The cubic root of 197891396 is about 582.7410838721.

The spelling of 197891396 in words is "one hundred ninety-seven million, eight hundred ninety-one thousand, three hundred ninety-six".