155000149 has 2 divisors, whose sum is σ = 155000150. Its totient is φ = 155000148.

The previous prime is 155000137. The next prime is 155000161. The reversal of 155000149 is 941000551.

It is a balanced prime because it is at equal distance from previous prime (155000137) and next prime (155000161).

It can be written as a sum of positive squares in only one way, i.e., 80730225 + 74269924 = 8985^2 + 8618^2 .

It is an emirp because it is prime and its reverse (941000551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155000149 - 2¹³ = 154991957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155000189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77500074 + 77500075.

It is an arithmetic number, because the mean of its divisors is an integer number (77500075).

Almost surely, 2^155000149 is an apocalyptic number.

It is an amenable number.

155000149 is a deficient number, since it is larger than the sum of its proper divisors (1).

155000149 is an equidigital number, since it uses as much as digits as its factorization.

155000149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 155000149 is about 12449.9055819713. The cubic root of 155000149 is about 537.1687076194.

The spelling of 155000149 in words is "one hundred fifty-five million, one hundred forty-nine", and thus it is an aban number.