197015087 has 4 divisors (see below), whose sum is σ = 197278176. Its totient is φ = 196752000.

The previous prime is 197015081. The next prime is 197015089. The reversal of 197015087 is 780510791.

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 197015087 - 2¹⁰ = 197014063 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 197015087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197015081) 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, 130418 + ... + 131919.

It is an arithmetic number, because the mean of its divisors is an integer number (49319544).

Almost surely, 2^197015087 is an apocalyptic number.

197015087 is a deficient number, since it is larger than the sum of its proper divisors (263089).

197015087 is an equidigital number, since it uses as much as digits as its factorization.

197015087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263088.

The product of its (nonzero) digits is 17640, while the sum is 38.

The square root of 197015087 is about 14036.2062894502. The cubic root of 197015087 is about 581.8796401675.

The spelling of 197015087 in words is "one hundred ninety-seven million, fifteen thousand, eighty-seven".