61047109 has 4 divisors (see below), whose sum is σ = 61130016. Its totient is φ = 60964204.

The previous prime is 61047101. The next prime is 61047131. The reversal of 61047109 is 90174016.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61047109 - 2³ = 61047101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61047101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40339 + ... + 41824.

It is an arithmetic number, because the mean of its divisors is an integer number (15282504).

Almost surely, 2^61047109 is an apocalyptic number.

It is an amenable number.

61047109 is a deficient number, since it is larger than the sum of its proper divisors (82907).

61047109 is an equidigital number, since it uses as much as digits as its factorization.

61047109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82906.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 61047109 is about 7813.2649385516. The cubic root of 61047109 is about 393.7510279977.

The spelling of 61047109 in words is "sixty-one million, forty-seven thousand, one hundred nine".