61984405 has 8 divisors (see below), whose sum is σ = 85007232. Its totient is φ = 42503568.

The previous prime is 61984387. The next prime is 61984421. The reversal of 61984405 is 50448916.

It is a happy number.

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 61984405 - 2¹⁷ = 61853333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 885457 + ... + 885526.

It is an arithmetic number, because the mean of its divisors is an integer number (10625904).

Almost surely, 2^61984405 is an apocalyptic number.

It is an amenable number.

61984405 is a deficient number, since it is larger than the sum of its proper divisors (23022827).

61984405 is a wasteful number, since it uses less digits than its factorization.

61984405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770995.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 61984405 is about 7873.0175282416. The cubic root of 61984405 is about 395.7559736049.

The spelling of 61984405 in words is "sixty-one million, nine hundred eighty-four thousand, four hundred five".