155411983 has 4 divisors (see below), whose sum is σ = 156057088. Its totient is φ = 154766880.

The previous prime is 155411947. The next prime is 155412007. The reversal of 155411983 is 389114551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155411983 - 2⁹ = 155411471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155411923) 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 in 3 ways as a sum of consecutive naturals, for example, 322191 + ... + 322672.

It is an arithmetic number, because the mean of its divisors is an integer number (39014272).

Almost surely, 2^155411983 is an apocalyptic number.

155411983 is a deficient number, since it is larger than the sum of its proper divisors (645105).

155411983 is an equidigital number, since it uses as much as digits as its factorization.

155411983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645104.

The product of its digits is 21600, while the sum is 37.

The square root of 155411983 is about 12466.4342536268. The cubic root of 155411983 is about 537.6440376912.

The spelling of 155411983 in words is "one hundred fifty-five million, four hundred eleven thousand, nine hundred eighty-three".