155916947 has 2 divisors, whose sum is σ = 155916948. Its totient is φ = 155916946.

The previous prime is 155916941. The next prime is 155916953. The reversal of 155916947 is 749619551.

It is a balanced prime because it is at equal distance from previous prime (155916941) and next prime (155916953).

It is an emirp because it is prime and its reverse (749619551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155916947 - 2⁶ = 155916883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155916941) 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, 77958473 + 77958474.

It is an arithmetic number, because the mean of its divisors is an integer number (77958474).

Almost surely, 2^155916947 is an apocalyptic number.

155916947 is a deficient number, since it is larger than the sum of its proper divisors (1).

155916947 is an equidigital number, since it uses as much as digits as its factorization.

155916947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 47.

The square root of 155916947 is about 12486.6707732686. The cubic root of 155916947 is about 538.2257117807.

The spelling of 155916947 in words is "one hundred fifty-five million, nine hundred sixteen thousand, nine hundred forty-seven".