61082987 has 4 divisors (see below), whose sum is σ = 69809136. Its totient is φ = 52356840.

The previous prime is 61082981. The next prime is 61083031. The reversal of 61082987 is 78928016.

61082987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61082987 - 2⁴ = 61082971 is a prime.

It is a super-2 number, since 2×61082987² = 7462262601684338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61082981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4363064 + ... + 4363077.

It is an arithmetic number, because the mean of its divisors is an integer number (17452284).

Almost surely, 2^61082987 is an apocalyptic number.

61082987 is a deficient number, since it is larger than the sum of its proper divisors (8726149).

61082987 is an equidigital number, since it uses as much as digits as its factorization.

61082987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8726148.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 61082987 is about 7815.5605685069. The cubic root of 61082987 is about 393.8281500377.

The spelling of 61082987 in words is "sixty-one million, eighty-two thousand, nine hundred eighty-seven".