61004739 has 4 divisors (see below), whose sum is σ = 81339656. Its totient is φ = 40669824.

The previous prime is 61004711. The next prime is 61004743. The reversal of 61004739 is 93740016.

It is a happy number.

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

It is not a de Polignac number, because 61004739 - 2¹¹ = 61002691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61004039) 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, 10167454 + ... + 10167459.

It is an arithmetic number, because the mean of its divisors is an integer number (20334914).

Almost surely, 2^61004739 is an apocalyptic number.

61004739 is a deficient number, since it is larger than the sum of its proper divisors (20334917).

61004739 is a wasteful number, since it uses less digits than its factorization.

61004739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20334916.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 61004739 is about 7810.5530534015. The cubic root of 61004739 is about 393.6599120682.

The spelling of 61004739 in words is "sixty-one million, four thousand, seven hundred thirty-nine".