155867149 has 2 divisors, whose sum is σ = 155867150. Its totient is φ = 155867148.

The previous prime is 155867137. The next prime is 155867167. The reversal of 155867149 is 941768551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89965225 + 65901924 = 9485^2 + 8118^2 .

It is a cyclic number.

It is not a de Polignac number, because 155867149 - 2⁹ = 155866637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155867099 and 155867108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155867189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77933574 + 77933575.

It is an arithmetic number, because the mean of its divisors is an integer number (77933575).

Almost surely, 2^155867149 is an apocalyptic number.

It is an amenable number.

155867149 is a deficient number, since it is larger than the sum of its proper divisors (1).

155867149 is an equidigital number, since it uses as much as digits as its factorization.

155867149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 46.

The square root of 155867149 is about 12484.6765676969. The cubic root of 155867149 is about 538.1684047368.

The spelling of 155867149 in words is "one hundred fifty-five million, eight hundred sixty-seven thousand, one hundred forty-nine".