61718073 has 4 divisors (see below), whose sum is σ = 82290768. Its totient is φ = 41145380.

The previous prime is 61718057. The next prime is 61718077. The reversal of 61718073 is 37081716.

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 not a de Polignac number, because 61718073 - 2⁴ = 61718057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61718077) 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 3 ways as a sum of consecutive naturals, for example, 10286343 + ... + 10286348.

It is an arithmetic number, because the mean of its divisors is an integer number (20572692).

Almost surely, 2^61718073 is an apocalyptic number.

It is an amenable number.

61718073 is a deficient number, since it is larger than the sum of its proper divisors (20572695).

61718073 is a wasteful number, since it uses less digits than its factorization.

61718073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20572694.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 61718073 is about 7856.0850937347. The cubic root of 61718073 is about 395.1883372542.

Adding to 61718073 its reverse (37081716), we get a palindrome (98799789).

The spelling of 61718073 in words is "sixty-one million, seven hundred eighteen thousand, seventy-three".