61505193 has 4 divisors (see below), whose sum is σ = 82006928. Its totient is φ = 41003460.

The previous prime is 61505189. The next prime is 61505203. The reversal of 61505193 is 39150516.

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 61505193 - 2² = 61505189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61505193.

It is not an unprimeable number, because it can be changed into a prime (61505113) 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, 10250863 + ... + 10250868.

It is an arithmetic number, because the mean of its divisors is an integer number (20501732).

Almost surely, 2^61505193 is an apocalyptic number.

It is an amenable number.

61505193 is a deficient number, since it is larger than the sum of its proper divisors (20501735).

61505193 is a wasteful number, since it uses less digits than its factorization.

61505193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20501734.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 61505193 is about 7842.5246572771. The cubic root of 61505193 is about 394.7334483254.

The spelling of 61505193 in words is "sixty-one million, five hundred five thousand, one hundred ninety-three".