61188913 has 8 divisors (see below), whose sum is σ = 62101728. Its totient is φ = 60282624.

The previous prime is 61188893. The next prime is 61188923. The reversal of 61188913 is 31988116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61188913 - 2⁹ = 61188401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61188923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19170 + ... + 22132.

It is an arithmetic number, because the mean of its divisors is an integer number (7762716).

Almost surely, 2^61188913 is an apocalyptic number.

It is an amenable number.

61188913 is a deficient number, since it is larger than the sum of its proper divisors (912815).

61188913 is a wasteful number, since it uses less digits than its factorization.

61188913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3263.

The product of its digits is 10368, while the sum is 37.

The square root of 61188913 is about 7822.3342424113. The cubic root of 61188913 is about 394.0556686525.

The spelling of 61188913 in words is "sixty-one million, one hundred eighty-eight thousand, nine hundred thirteen".