145978563 has 4 divisors (see below), whose sum is σ = 194638088. Its totient is φ = 97319040.

The previous prime is 145978549. The next prime is 145978583. The reversal of 145978563 is 365879541.

145978563 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: 365879541 = 3 ⋅121959847.

It is not a de Polignac number, because 145978563 - 2⁵ = 145978531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145978513) 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, 24329758 + ... + 24329763.

It is an arithmetic number, because the mean of its divisors is an integer number (48659522).

Almost surely, 2^145978563 is an apocalyptic number.

145978563 is a deficient number, since it is larger than the sum of its proper divisors (48659525).

145978563 is an equidigital number, since it uses as much as digits as its factorization.

145978563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48659524.

The product of its digits is 907200, while the sum is 48.

The square root of 145978563 is about 12082.1588716587. The cubic root of 145978563 is about 526.5379699873.

The spelling of 145978563 in words is "one hundred forty-five million, nine hundred seventy-eight thousand, five hundred sixty-three".