155340187 has 2 divisors, whose sum is σ = 155340188. Its totient is φ = 155340186.

The previous prime is 155340167. The next prime is 155340223. The reversal of 155340187 is 781043551.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (781043551) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155340187 is a prime.

It is not a weakly prime, because it can be changed into another prime (155340167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77670093 + 77670094.

It is an arithmetic number, because the mean of its divisors is an integer number (77670094).

Almost surely, 2^155340187 is an apocalyptic number.

155340187 is a deficient number, since it is larger than the sum of its proper divisors (1).

155340187 is an equidigital number, since it uses as much as digits as its factorization.

155340187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 155340187 is about 12463.5543485797. The cubic root of 155340187 is about 537.5612327572.

The spelling of 155340187 in words is "one hundred fifty-five million, three hundred forty thousand, one hundred eighty-seven".