145170923 has 4 divisors (see below), whose sum is σ = 149853888. Its totient is φ = 140487960.

The previous prime is 145170913. The next prime is 145170937. The reversal of 145170923 is 329071541.

145170923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 145170923 - 2²⁶ = 78062059 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 145170923.

It is not an unprimeable number, because it can be changed into a prime (145170913) 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, 2341436 + ... + 2341497.

It is an arithmetic number, because the mean of its divisors is an integer number (37463472).

Almost surely, 2^145170923 is an apocalyptic number.

145170923 is a deficient number, since it is larger than the sum of its proper divisors (4682965).

145170923 is an equidigital number, since it uses as much as digits as its factorization.

145170923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4682964.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 145170923 is about 12048.6896797951. The cubic root of 145170923 is about 525.5651335479.

The spelling of 145170923 in words is "one hundred forty-five million, one hundred seventy thousand, nine hundred twenty-three".