197664803 has 4 divisors (see below), whose sum is σ = 225902640. Its totient is φ = 169426968.

The previous prime is 197664787. The next prime is 197664823. The reversal of 197664803 is 308466791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 197664803 - 2⁴ = 197664787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197664823) 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, 14118908 + ... + 14118921.

It is an arithmetic number, because the mean of its divisors is an integer number (56475660).

Almost surely, 2^197664803 is an apocalyptic number.

197664803 is a deficient number, since it is larger than the sum of its proper divisors (28237837).

197664803 is an equidigital number, since it uses as much as digits as its factorization.

197664803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28237836.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 197664803 is about 14059.3315274945. The cubic root of 197664803 is about 582.5185788618.

The spelling of 197664803 in words is "one hundred ninety-seven million, six hundred sixty-four thousand, eight hundred three".