197157910 has 8 divisors (see below), whose sum is σ = 354884256. Its totient is φ = 78863160.

The previous prime is 197157907. The next prime is 197157911. The reversal of 197157910 is 19751791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197157911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9857886 + ... + 9857905.

It is an arithmetic number, because the mean of its divisors is an integer number (44360532).

Almost surely, 2^197157910 is an apocalyptic number.

197157910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197157910 is a deficient number, since it is larger than the sum of its proper divisors (157726346).

197157910 is a wasteful number, since it uses less digits than its factorization.

197157910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19715798.

The product of its (nonzero) digits is 19845, while the sum is 40.

The square root of 197157910 is about 14041.2930316264. The cubic root of 197157910 is about 582.0202143796.

The spelling of 197157910 in words is "one hundred ninety-seven million, one hundred fifty-seven thousand, nine hundred ten".