187140971 has 2 divisors, whose sum is σ = 187140972. Its totient is φ = 187140970.

The previous prime is 187140959. The next prime is 187140991. The reversal of 187140971 is 179041781.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (179041781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 187140971 - 2²² = 182946667 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (187140911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93570485 + 93570486.

It is an arithmetic number, because the mean of its divisors is an integer number (93570486).

Almost surely, 2^187140971 is an apocalyptic number.

187140971 is a deficient number, since it is larger than the sum of its proper divisors (1).

187140971 is an equidigital number, since it uses as much as digits as its factorization.

187140971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 38.

The square root of 187140971 is about 13679.9477703681. The cubic root of 187140971 is about 571.9915673117.

The spelling of 187140971 in words is "one hundred eighty-seven million, one hundred forty thousand, nine hundred seventy-one".