61172927 has 4 divisors (see below), whose sum is σ = 61613160. Its totient is φ = 60732696.

The previous prime is 61172899. The next prime is 61172933. The reversal of 61172927 is 72927116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61172927 - 2¹⁶ = 61107391 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 (61172227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219908 + ... + 220185.

It is an arithmetic number, because the mean of its divisors is an integer number (15403290).

Almost surely, 2^61172927 is an apocalyptic number.

61172927 is a deficient number, since it is larger than the sum of its proper divisors (440233).

61172927 is a wasteful number, since it uses less digits than its factorization.

61172927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440232.

The product of its digits is 10584, while the sum is 35.

The square root of 61172927 is about 7821.3123579103. The cubic root of 61172927 is about 394.0213491313.

The spelling of 61172927 in words is "sixty-one million, one hundred seventy-two thousand, nine hundred twenty-seven".