61683389 has 4 divisors (see below), whose sum is σ = 61699356. Its totient is φ = 61667424.

The previous prime is 61683373. The next prime is 61683407. The reversal of 61683389 is 98338616.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 47748100 + 13935289 = 6910^2 + 3733^2 .

It is a cyclic number.

It is not a de Polignac number, because 61683389 - 2⁴ = 61683373 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 (61683289) 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, 1847 + ... + 11259.

It is an arithmetic number, because the mean of its divisors is an integer number (15424839).

Almost surely, 2^61683389 is an apocalyptic number.

It is an amenable number.

61683389 is a deficient number, since it is larger than the sum of its proper divisors (15967).

61683389 is an equidigital number, since it uses as much as digits as its factorization.

61683389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15966.

The product of its digits is 186624, while the sum is 44.

The square root of 61683389 is about 7853.8773226986. The cubic root of 61683389 is about 395.1142947573.

The spelling of 61683389 in words is "sixty-one million, six hundred eighty-three thousand, three hundred eighty-nine".