61193109 has 4 divisors (see below), whose sum is σ = 81590816. Its totient is φ = 40795404.

The previous prime is 61193063. The next prime is 61193117. The reversal of 61193109 is 90139116.

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 not a de Polignac number, because 61193109 - 2¹⁹ = 60668821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61193189) 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, 10198849 + ... + 10198854.

It is an arithmetic number, because the mean of its divisors is an integer number (20397704).

Almost surely, 2^61193109 is an apocalyptic number.

It is an amenable number.

61193109 is a deficient number, since it is larger than the sum of its proper divisors (20397707).

61193109 is a wasteful number, since it uses less digits than its factorization.

61193109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20397706.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 61193109 is about 7822.6024441998. The cubic root of 61193109 is about 394.0646758386.

The spelling of 61193109 in words is "sixty-one million, one hundred ninety-three thousand, one hundred nine".