61982239 has 4 divisors (see below), whose sum is σ = 67617000. Its totient is φ = 56347480.

The previous prime is 61982231. The next prime is 61982243. The reversal of 61982239 is 93228916.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 61982239 - 2³ = 61982231 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61982231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2817364 + ... + 2817385.

It is an arithmetic number, because the mean of its divisors is an integer number (16904250).

Almost surely, 2^61982239 is an apocalyptic number.

61982239 is a deficient number, since it is larger than the sum of its proper divisors (5634761).

61982239 is a wasteful number, since it uses less digits than its factorization.

61982239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5634760.

The product of its digits is 46656, while the sum is 40.

The square root of 61982239 is about 7872.8799686011. The cubic root of 61982239 is about 395.7513637495.

The spelling of 61982239 in words is "sixty-one million, nine hundred eighty-two thousand, two hundred thirty-nine".