61439071 has 8 divisors (see below), whose sum is σ = 65336544. Its totient is φ = 57573120.

The previous prime is 61439057. The next prime is 61439087. The reversal of 61439071 is 17093416.

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 61439071 - 2⁵ = 61439039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61439471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3795 + ... + 11716.

It is an arithmetic number, because the mean of its divisors is an integer number (8167068).

Almost surely, 2^61439071 is an apocalyptic number.

61439071 is a deficient number, since it is larger than the sum of its proper divisors (3897473).

61439071 is a wasteful number, since it uses less digits than its factorization.

61439071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15761.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 61439071 is about 7838.3079168912. The cubic root of 61439071 is about 394.5919430712.

The spelling of 61439071 in words is "sixty-one million, four hundred thirty-nine thousand, seventy-one".