155385647 has 2 divisors, whose sum is σ = 155385648. Its totient is φ = 155385646.

The previous prime is 155385589. The next prime is 155385679. The reversal of 155385647 is 746583551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155385647 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 155385598 and 155385607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155385847) 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, 77692823 + 77692824.

It is an arithmetic number, because the mean of its divisors is an integer number (77692824).

Almost surely, 2^155385647 is an apocalyptic number.

155385647 is a deficient number, since it is larger than the sum of its proper divisors (1).

155385647 is an equidigital number, since it uses as much as digits as its factorization.

155385647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504000, while the sum is 44.

The square root of 155385647 is about 12465.3779324977. The cubic root of 155385647 is about 537.6136663883.

The spelling of 155385647 in words is "one hundred fifty-five million, three hundred eighty-five thousand, six hundred forty-seven".