61989782 has 4 divisors (see below), whose sum is σ = 92984676. Its totient is φ = 30994890.

The previous prime is 61989749. The next prime is 61989797. The reversal of 61989782 is 28798916.

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

It is a self number, because there is not a number n which added to its sum of digits gives 61989782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15497444 + ... + 15497447.

It is an arithmetic number, because the mean of its divisors is an integer number (23246169).

Almost surely, 2^61989782 is an apocalyptic number.

61989782 is a deficient number, since it is larger than the sum of its proper divisors (30994894).

61989782 is a wasteful number, since it uses less digits than its factorization.

61989782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30994893.

The product of its digits is 435456, while the sum is 50.

The square root of 61989782 is about 7873.3590036274. The cubic root of 61989782 is about 395.7674169044.

The spelling of 61989782 in words is "sixty-one million, nine hundred eighty-nine thousand, seven hundred eighty-two".