155378923 has 8 divisors (see below), whose sum is σ = 178419200. Its totient is φ = 132549480.

The previous prime is 155378879. The next prime is 155378933. The reversal of 155378923 is 329873551.

155378923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-155378923 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 155378923.

It is not an unprimeable number, because it can be changed into a prime (155378933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51123 + ... + 54076.

It is an arithmetic number, because the mean of its divisors is an integer number (22302400).

Almost surely, 2^155378923 is an apocalyptic number.

155378923 is a deficient number, since it is larger than the sum of its proper divisors (23040277).

155378923 is a wasteful number, since it uses less digits than its factorization.

155378923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105417.

The product of its digits is 226800, while the sum is 43.

The square root of 155378923 is about 12465.1082225547. The cubic root of 155378923 is about 537.6059115613.

The spelling of 155378923 in words is "one hundred fifty-five million, three hundred seventy-eight thousand, nine hundred twenty-three".