187012081 has 2 divisors, whose sum is σ = 187012082. Its totient is φ = 187012080.

The previous prime is 187012073. The next prime is 187012093. The reversal of 187012081 is 180210781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120099681 + 66912400 = 10959^2 + 8180^2 .

It is a cyclic number.

It is not a de Polignac number, because 187012081 - 2³ = 187012073 is a prime.

It is a super-2 number, since 2×187012081² = 69947036879901122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (187012061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93506040 + 93506041.

It is an arithmetic number, because the mean of its divisors is an integer number (93506041).

Almost surely, 2^187012081 is an apocalyptic number.

It is an amenable number.

187012081 is a deficient number, since it is larger than the sum of its proper divisors (1).

187012081 is an equidigital number, since it uses as much as digits as its factorization.

187012081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 187012081 is about 13675.2360491510. The cubic root of 187012081 is about 571.8602208290.

The spelling of 187012081 in words is "one hundred eighty-seven million, twelve thousand, eighty-one".