155120887 has 2 divisors, whose sum is σ = 155120888. Its totient is φ = 155120886.

The previous prime is 155120873. The next prime is 155120981. The reversal of 155120887 is 788021551.

It is a weak prime.

It is an emirp because it is prime and its reverse (788021551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155120887 - 2¹⁵ = 155088119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155120837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77560443 + 77560444.

It is an arithmetic number, because the mean of its divisors is an integer number (77560444).

Almost surely, 2^155120887 is an apocalyptic number.

155120887 is a deficient number, since it is larger than the sum of its proper divisors (1).

155120887 is an equidigital number, since it uses as much as digits as its factorization.

155120887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22400, while the sum is 37.

The square root of 155120887 is about 12454.7535904971. The cubic root of 155120887 is about 537.3081480070.

The spelling of 155120887 in words is "one hundred fifty-five million, one hundred twenty thousand, eight hundred eighty-seven".