145788905 has 4 divisors (see below), whose sum is σ = 174946692. Its totient is φ = 116631120.

The previous prime is 145788883. The next prime is 145788911. The reversal of 145788905 is 509887541.

145788905 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, and also an emirpimes, since its reverse is a distinct semiprime: 509887541 = 29 ⋅17582329.

It can be written as a sum of positive squares in 2 ways, for example, as 96746896 + 49042009 = 9836^2 + 7003^2 .

It is not a de Polignac number, because 145788905 - 2⁸ = 145788649 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 145788905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14578886 + ... + 14578895.

It is an arithmetic number, because the mean of its divisors is an integer number (43736673).

Almost surely, 2^145788905 is an apocalyptic number.

It is an amenable number.

145788905 is a deficient number, since it is larger than the sum of its proper divisors (29157787).

145788905 is an equidigital number, since it uses as much as digits as its factorization.

145788905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29157786.

The product of its (nonzero) digits is 403200, while the sum is 47.

The square root of 145788905 is about 12074.3076406061. The cubic root of 145788905 is about 526.3098419319.

The spelling of 145788905 in words is "one hundred forty-five million, seven hundred eighty-eight thousand, nine hundred five".