61986894 has 8 divisors (see below), whose sum is σ = 123973800. Its totient is φ = 20662296.

The previous prime is 61986871. The next prime is 61986901. The reversal of 61986894 is 49868916.

It is a happy number.

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

61986894 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5165569 + ... + 5165580.

It is an arithmetic number, because the mean of its divisors is an integer number (15496725).

Almost surely, 2^61986894 is an apocalyptic number.

61986894 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61986894 is a wasteful number, since it uses less digits than its factorization.

61986894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10331154.

The product of its digits is 746496, while the sum is 51.

The square root of 61986894 is about 7873.1755981942. The cubic root of 61986894 is about 395.7612707622.

The spelling of 61986894 in words is "sixty-one million, nine hundred eighty-six thousand, eight hundred ninety-four".