145188847 has 4 divisors (see below), whose sum is σ = 145627816. Its totient is φ = 144749880.

The previous prime is 145188839. The next prime is 145188859. The reversal of 145188847 is 748881541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 748881541 = 23 ⋅32560067.

It is a cyclic number.

It is not a de Polignac number, because 145188847 - 2³ = 145188839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145188797 and 145188806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145188817) 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, 218988 + ... + 219649.

It is an arithmetic number, because the mean of its divisors is an integer number (36406954).

Almost surely, 2^145188847 is an apocalyptic number.

145188847 is a deficient number, since it is larger than the sum of its proper divisors (438969).

145188847 is an equidigital number, since it uses as much as digits as its factorization.

145188847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438968.

The product of its digits is 286720, while the sum is 46.

The square root of 145188847 is about 12049.4334721596. The cubic root of 145188847 is about 525.5867628604.

The spelling of 145188847 in words is "one hundred forty-five million, one hundred eighty-eight thousand, eight hundred forty-seven".