155378387 has 2 divisors, whose sum is σ = 155378388. Its totient is φ = 155378386.

The previous prime is 155378369. The next prime is 155378401. The reversal of 155378387 is 783873551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155378387 - 2⁶ = 155378323 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155378357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77689193 + 77689194.

It is an arithmetic number, because the mean of its divisors is an integer number (77689194).

Almost surely, 2^155378387 is an apocalyptic number.

155378387 is a deficient number, since it is larger than the sum of its proper divisors (1).

155378387 is an equidigital number, since it uses as much as digits as its factorization.

155378387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 705600, while the sum is 47.

The square root of 155378387 is about 12465.0867225222. The cubic root of 155378387 is about 537.6052933798.

The spelling of 155378387 in words is "one hundred fifty-five million, three hundred seventy-eight thousand, three hundred eighty-seven".