197963641 has 4 divisors (see below), whose sum is σ = 208382800. Its totient is φ = 187544484.

The previous prime is 197963617. The next prime is 197963677. The reversal of 197963641 is 146369791.

It is a happy number.

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 197963641 - 2⁵ = 197963609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 197963591 and 197963600.

It is not an unprimeable number, because it can be changed into a prime (197963141) 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, 5209551 + ... + 5209588.

It is an arithmetic number, because the mean of its divisors is an integer number (52095700).

Almost surely, 2^197963641 is an apocalyptic number.

It is an amenable number.

197963641 is a deficient number, since it is larger than the sum of its proper divisors (10419159).

197963641 is a wasteful number, since it uses less digits than its factorization.

197963641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10419158.

The product of its digits is 244944, while the sum is 46.

The square root of 197963641 is about 14069.9552593461. The cubic root of 197963641 is about 582.8119897803.

The spelling of 197963641 in words is "one hundred ninety-seven million, nine hundred sixty-three thousand, six hundred forty-one".