197157995 has 8 divisors (see below), whose sum is σ = 236708784. Its totient is φ = 157646944.

The previous prime is 197157977. The next prime is 197158007. The reversal of 197157995 is 599751791.

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

It is a cyclic number.

It is not a de Polignac number, because 197157995 - 2¹⁴ = 197141611 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2372 + ... + 19998.

It is an arithmetic number, because the mean of its divisors is an integer number (29588598).

Almost surely, 2^197157995 is an apocalyptic number.

197157995 is a deficient number, since it is larger than the sum of its proper divisors (39550789).

197157995 is a wasteful number, since it uses less digits than its factorization.

197157995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19869.

The product of its digits is 893025, while the sum is 53.

The square root of 197157995 is about 14041.2960584128. The cubic root of 197157995 is about 582.0202980210.

The spelling of 197157995 in words is "one hundred ninety-seven million, one hundred fifty-seven thousand, nine hundred ninety-five".