61688713 has 8 divisors (see below), whose sum is σ = 64108800. Its totient is φ = 59288208.

The previous prime is 61688681. The next prime is 61688717. The reversal of 61688713 is 31788616.

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 61688713 - 2⁵ = 61688681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61688717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1698 + ... + 11236.

It is an arithmetic number, because the mean of its divisors is an integer number (8013600).

Almost surely, 2^61688713 is an apocalyptic number.

It is an amenable number.

61688713 is a deficient number, since it is larger than the sum of its proper divisors (2420087).

61688713 is a wasteful number, since it uses less digits than its factorization.

61688713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9791.

The product of its digits is 48384, while the sum is 40.

The square root of 61688713 is about 7854.2162562537. The cubic root of 61688713 is about 395.1256620963.

The spelling of 61688713 in words is "sixty-one million, six hundred eighty-eight thousand, seven hundred thirteen".