61281673 has 4 divisors (see below), whose sum is σ = 61301968. Its totient is φ = 61261380.

The previous prime is 61281667. The next prime is 61281743. The reversal of 61281673 is 37618216.

61281673 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61281673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61281173) 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, 4611 + ... + 11992.

It is an arithmetic number, because the mean of its divisors is an integer number (15325492).

Almost surely, 2^61281673 is an apocalyptic number.

It is an amenable number.

61281673 is a deficient number, since it is larger than the sum of its proper divisors (20295).

61281673 is a wasteful number, since it uses less digits than its factorization.

61281673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20294.

The product of its digits is 12096, while the sum is 34.

The square root of 61281673 is about 7828.2611734663. The cubic root of 61281673 is about 394.2546924451.

Adding to 61281673 its reverse (37618216), we get a palindrome (98899889).

The spelling of 61281673 in words is "sixty-one million, two hundred eighty-one thousand, six hundred seventy-three".