197015887 has 2 divisors, whose sum is σ = 197015888. Its totient is φ = 197015886.

The previous prime is 197015867. The next prime is 197015933. The reversal of 197015887 is 788510791.

It is an a-pointer prime, because the next prime (197015933) can be obtained adding 197015887 to its sum of digits (46).

It is a weak prime.

It is an emirp because it is prime and its reverse (788510791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197015887 - 2²³ = 188627279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197015867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98507943 + 98507944.

It is an arithmetic number, because the mean of its divisors is an integer number (98507944).

Almost surely, 2^197015887 is an apocalyptic number.

197015887 is a deficient number, since it is larger than the sum of its proper divisors (1).

197015887 is an equidigital number, since it uses as much as digits as its factorization.

197015887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 46.

The square root of 197015887 is about 14036.2347871500. The cubic root of 197015887 is about 581.8804277605.

The spelling of 197015887 in words is "one hundred ninety-seven million, fifteen thousand, eight hundred eighty-seven".