197907383878 has 4 divisors (see below), whose sum is σ = 296861075820. Its totient is φ = 98953691938.

The previous prime is 197907383851. The next prime is 197907383879. The reversal of 197907383878 is 878383709791.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197907383879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49476845968 + ... + 49476845971.

It is an arithmetic number, because the mean of its divisors is an integer number (74215268955).

Almost surely, 2^197907383878 is an apocalyptic number.

197907383878 is a deficient number, since it is larger than the sum of its proper divisors (98953691942).

197907383878 is an equidigital number, since it uses as much as digits as its factorization.

197907383878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98953691941.

The product of its (nonzero) digits is 128024064, while the sum is 70.

The spelling of 197907383878 in words is "one hundred ninety-seven billion, nine hundred seven million, three hundred eighty-three thousand, eight hundred seventy-eight".