61718797 has 8 divisors (see below), whose sum is σ = 70583552. Its totient is φ = 52866000.

The previous prime is 61718759. The next prime is 61718801. The reversal of 61718797 is 79781716.

61718797 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 a de Polignac number, because none of the positive numbers 2^k-61718797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61718297) 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, 17047 + ... + 20347.

It is an arithmetic number, because the mean of its divisors is an integer number (8822944).

Almost surely, 2^61718797 is an apocalyptic number.

It is an amenable number.

61718797 is a deficient number, since it is larger than the sum of its proper divisors (8864755).

61718797 is a wasteful number, since it uses less digits than its factorization.

61718797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5979.

The product of its digits is 148176, while the sum is 46.

The square root of 61718797 is about 7856.1311725302. The cubic root of 61718797 is about 395.1898825349.

The spelling of 61718797 in words is "sixty-one million, seven hundred eighteen thousand, seven hundred ninety-seven".