155386129 has 2 divisors, whose sum is σ = 155386130. Its totient is φ = 155386128.

The previous prime is 155386081. The next prime is 155386159. The reversal of 155386129 is 921683551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112784400 + 42601729 = 10620^2 + 6527^2 .

It is a cyclic number.

It is not a de Polignac number, because 155386129 - 2¹¹ = 155384081 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 155386091 and 155386100.

It is not a weakly prime, because it can be changed into another prime (155386159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77693064 + 77693065.

It is an arithmetic number, because the mean of its divisors is an integer number (77693065).

Almost surely, 2^155386129 is an apocalyptic number.

It is an amenable number.

155386129 is a deficient number, since it is larger than the sum of its proper divisors (1).

155386129 is an equidigital number, since it uses as much as digits as its factorization.

155386129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 40.

The square root of 155386129 is about 12465.3972660321. The cubic root of 155386129 is about 537.6142222730.

The spelling of 155386129 in words is "one hundred fifty-five million, three hundred eighty-six thousand, one hundred twenty-nine".