155946863 has 2 divisors, whose sum is σ = 155946864. Its totient is φ = 155946862.

The previous prime is 155946809. The next prime is 155946883. The reversal of 155946863 is 368649551.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155946863 - 2¹⁸ = 155684719 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155946883) 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, 77973431 + 77973432.

It is an arithmetic number, because the mean of its divisors is an integer number (77973432).

Almost surely, 2^155946863 is an apocalyptic number.

155946863 is a deficient number, since it is larger than the sum of its proper divisors (1).

155946863 is an equidigital number, since it uses as much as digits as its factorization.

155946863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 47.

The square root of 155946863 is about 12487.8686331976. The cubic root of 155946863 is about 538.2601329496.

The spelling of 155946863 in words is "one hundred fifty-five million, nine hundred forty-six thousand, eight hundred sixty-three".