61887193 has 4 divisors (see below), whose sum is σ = 61954740. Its totient is φ = 61819648.

The previous prime is 61887179. The next prime is 61887223. The reversal of 61887193 is 39178816.

61887193 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 374544 + 61512649 = 612^2 + 7843^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61887193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61887143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32380 + ... + 34237.

It is an arithmetic number, because the mean of its divisors is an integer number (15488685).

Almost surely, 2^61887193 is an apocalyptic number.

It is an amenable number.

61887193 is a deficient number, since it is larger than the sum of its proper divisors (67547).

61887193 is an equidigital number, since it uses as much as digits as its factorization.

61887193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67546.

The product of its digits is 72576, while the sum is 43.

The square root of 61887193 is about 7866.8413610546. The cubic root of 61887193 is about 395.5489733676.

The spelling of 61887193 in words is "sixty-one million, eight hundred eighty-seven thousand, one hundred ninety-three".