61544723 has 4 divisors (see below), whose sum is σ = 61742928. Its totient is φ = 61346520.

The previous prime is 61544719. The next prime is 61544737. The reversal of 61544723 is 32744516.

61544723 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 61544723 - 2² = 61544719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61544723.

It is not an unprimeable number, because it can be changed into a prime (61544753) 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, 98636 + ... + 99257.

It is an arithmetic number, because the mean of its divisors is an integer number (15435732).

Almost surely, 2^61544723 is an apocalyptic number.

61544723 is a deficient number, since it is larger than the sum of its proper divisors (198205).

61544723 is a wasteful number, since it uses less digits than its factorization.

61544723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198204.

The product of its digits is 20160, while the sum is 32.

The square root of 61544723 is about 7845.0444868082. The cubic root of 61544723 is about 394.8179965873.

The spelling of 61544723 in words is "sixty-one million, five hundred forty-four thousand, seven hundred twenty-three".