187381147 has 2 divisors, whose sum is σ = 187381148. Its totient is φ = 187381146.

The previous prime is 187381121. The next prime is 187381153. The reversal of 187381147 is 741183781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 187381147 - 2¹¹ = 187379099 is a prime.

It is a super-2 number, since 2×187381147² = 70223388502071218, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (187381177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93690573 + 93690574.

It is an arithmetic number, because the mean of its divisors is an integer number (93690574).

Almost surely, 2^187381147 is an apocalyptic number.

187381147 is a deficient number, since it is larger than the sum of its proper divisors (1).

187381147 is an equidigital number, since it uses as much as digits as its factorization.

187381147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 40.

The square root of 187381147 is about 13688.7233517228. The cubic root of 187381147 is about 572.2361599619.

The spelling of 187381147 in words is "one hundred eighty-seven million, three hundred eighty-one thousand, one hundred forty-seven".