61888739 has 8 divisors (see below), whose sum is σ = 69085632. Its totient is φ = 54953640.

The previous prime is 61888711. The next prime is 61888759. The reversal of 61888739 is 93788816.

It is a happy number.

61888739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61888739 - 2²⁰ = 60840163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61888759) 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 7 ways as a sum of consecutive naturals, for example, 64949 + ... + 65894.

It is an arithmetic number, because the mean of its divisors is an integer number (8635704).

Almost surely, 2^61888739 is an apocalyptic number.

61888739 is a deficient number, since it is larger than the sum of its proper divisors (7196893).

61888739 is a wasteful number, since it uses less digits than its factorization.

61888739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130897.

The product of its digits is 580608, while the sum is 50.

The square root of 61888739 is about 7866.9396209708. The cubic root of 61888739 is about 395.5522670680.

The spelling of 61888739 in words is "sixty-one million, eight hundred eighty-eight thousand, seven hundred thirty-nine".