105978563 has 4 divisors (see below), whose sum is σ = 108563448. Its totient is φ = 103393680.

The previous prime is 105978547. The next prime is 105978581. The reversal of 105978563 is 365879501.

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 105978563 - 2⁴ = 105978547 is a prime.

It is a super-2 number, since 2×105978563² = 22462911631089938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105978583) 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, 1292381 + ... + 1292462.

It is an arithmetic number, because the mean of its divisors is an integer number (27140862).

Almost surely, 2^105978563 is an apocalyptic number.

105978563 is a deficient number, since it is larger than the sum of its proper divisors (2584885).

105978563 is an equidigital number, since it uses as much as digits as its factorization.

105978563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2584884.

The product of its (nonzero) digits is 226800, while the sum is 44.

The square root of 105978563 is about 10294.5890155946. The cubic root of 105978563 is about 473.2304434277.

The spelling of 105978563 in words is "one hundred five million, nine hundred seventy-eight thousand, five hundred sixty-three".