197399087 has 8 divisors (see below), whose sum is σ = 218098656. Its totient is φ = 177709312.

The previous prime is 197399077. The next prime is 197399089. The reversal of 197399087 is 780993791.

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 197399087 - 2⁶ = 197399023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197399089) by changing a digit.

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, 252038 + ... + 252819.

It is an arithmetic number, because the mean of its divisors is an integer number (27262332).

Almost surely, 2^197399087 is an apocalyptic number.

197399087 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

197399087 is a deficient number, since it is larger than the sum of its proper divisors (20699569).

197399087 is a wasteful number, since it uses less digits than its factorization.

197399087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504897.

The product of its (nonzero) digits is 857304, while the sum is 53.

The square root of 197399087 is about 14049.8785404003. The cubic root of 197399087 is about 582.2574399474.

The spelling of 197399087 in words is "one hundred ninety-seven million, three hundred ninety-nine thousand, eighty-seven".