1105138906 has 4 divisors (see below), whose sum is σ = 1657708362. Its totient is φ = 552569452.

The previous prime is 1105138883. The next prime is 1105138913. The reversal of 1105138906 is 6098315011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 582787881 + 522351025 = 24141^2 + 22855^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 276284725 + ... + 276284728.

Almost surely, 2^1105138906 is an apocalyptic number.

1105138906 is a deficient number, since it is larger than the sum of its proper divisors (552569456).

1105138906 is an equidigital number, since it uses as much as digits as its factorization.

1105138906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552569455.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 1105138906 is about 33243.6295551494. The cubic root of 1105138906 is about 1033.8851309104.

The spelling of 1105138906 in words is "one billion, one hundred five million, one hundred thirty-eight thousand, nine hundred six".