155027839 has 2 divisors, whose sum is σ = 155027840. Its totient is φ = 155027838.

The previous prime is 155027801. The next prime is 155027863. The reversal of 155027839 is 938720551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155027839 - 2⁷ = 155027711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155027339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77513919 + 77513920.

It is an arithmetic number, because the mean of its divisors is an integer number (77513920).

Almost surely, 2^155027839 is an apocalyptic number.

155027839 is a deficient number, since it is larger than the sum of its proper divisors (1).

155027839 is an equidigital number, since it uses as much as digits as its factorization.

155027839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 155027839 is about 12451.0175889363. The cubic root of 155027839 is about 537.2006932142.

The spelling of 155027839 in words is "one hundred fifty-five million, twenty-seven thousand, eight hundred thirty-nine".