155412923 has 4 divisors (see below), whose sum is σ = 155440968. Its totient is φ = 155384880.

The previous prime is 155412893. The next prime is 155412931. The reversal of 155412923 is 329214551.

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 155412923 - 2²⁰ = 154364347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155412923.

It is not an unprimeable number, because it can be changed into a prime (155412953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2618 + ... + 17823.

It is an arithmetic number, because the mean of its divisors is an integer number (38860242).

Almost surely, 2^155412923 is an apocalyptic number.

155412923 is a deficient number, since it is larger than the sum of its proper divisors (28045).

155412923 is an equidigital number, since it uses as much as digits as its factorization.

155412923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28044.

The product of its digits is 10800, while the sum is 32.

The square root of 155412923 is about 12466.4719548074. The cubic root of 155412923 is about 537.6451216582.

The spelling of 155412923 in words is "one hundred fifty-five million, four hundred twelve thousand, nine hundred twenty-three".