61304109 has 4 divisors (see below), whose sum is σ = 81738816. Its totient is φ = 40869404.

The previous prime is 61304083. The next prime is 61304123. The reversal of 61304109 is 90140316.

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 61304109 - 2⁵ = 61304077 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61304149) 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, 10217349 + ... + 10217354.

It is an arithmetic number, because the mean of its divisors is an integer number (20434704).

Almost surely, 2^61304109 is an apocalyptic number.

It is an amenable number.

61304109 is a deficient number, since it is larger than the sum of its proper divisors (20434707).

61304109 is a wasteful number, since it uses less digits than its factorization.

61304109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20434706.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 61304109 is about 7829.6940553255. The cubic root of 61304109 is about 394.3028004605.

The spelling of 61304109 in words is "sixty-one million, three hundred four thousand, one hundred nine".