105991479 has 12 divisors (see below), whose sum is σ = 167017032. Its totient is φ = 64237200.

The previous prime is 105991469. The next prime is 105991513. The reversal of 105991479 is 974199501.

105991479 is a `hidden beast` number, since 10 + 599 + 1 + 47 + 9 = 666.

It is not a de Polignac number, because 105991479 - 2⁴ = 105991463 is a prime.

It is a super-2 number, since 2×105991479² = 22468387241214882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105991409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 535212 + ... + 535409.

It is an arithmetic number, because the mean of its divisors is an integer number (13918086).

Almost surely, 2^105991479 is an apocalyptic number.

105991479 is a deficient number, since it is larger than the sum of its proper divisors (61025553).

105991479 is a wasteful number, since it uses less digits than its factorization.

105991479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070638 (or 1070635 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 45.

The square root of 105991479 is about 10295.2163163287. The cubic root of 105991479 is about 473.2496674291.

The spelling of 105991479 in words is "one hundred five million, nine hundred ninety-one thousand, four hundred seventy-nine".