61106209 has 8 divisors (see below), whose sum is σ = 61630272. Its totient is φ = 60584880.

The previous prime is 61106189. The next prime is 61106231. The reversal of 61106209 is 90260116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61106209 - 2²³ = 52717601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61106609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74019 + ... + 74839.

It is an arithmetic number, because the mean of its divisors is an integer number (7703784).

Almost surely, 2^61106209 is an apocalyptic number.

It is an amenable number.

61106209 is a deficient number, since it is larger than the sum of its proper divisors (524063).

61106209 is a wasteful number, since it uses less digits than its factorization.

61106209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 61106209 is about 7817.0460533375. The cubic root of 61106209 is about 393.8780511043.

The spelling of 61106209 in words is "sixty-one million, one hundred six thousand, two hundred nine".