155840119 has 2 divisors, whose sum is σ = 155840120. Its totient is φ = 155840118.

The previous prime is 155840117. The next prime is 155840123. The reversal of 155840119 is 911048551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155840119 - 2¹ = 155840117 is a prime.

It is a super-2 number, since 2×155840119² = 48572285379868322, which contains 22 as substring.

Together with 155840117, it forms a pair of twin primes.

It is equal to p_8754145 and since 155840119 and 8754145 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155840117) 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, 77920059 + 77920060.

It is an arithmetic number, because the mean of its divisors is an integer number (77920060).

Almost surely, 2^155840119 is an apocalyptic number.

155840119 is a deficient number, since it is larger than the sum of its proper divisors (1).

155840119 is an equidigital number, since it uses as much as digits as its factorization.

155840119 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 34.

The square root of 155840119 is about 12483.5939937183. The cubic root of 155840119 is about 538.1372937703.

The spelling of 155840119 in words is "one hundred fifty-five million, eight hundred forty thousand, one hundred nineteen".