61713989 has 4 divisors (see below), whose sum is σ = 61762656. Its totient is φ = 61665324.

The previous prime is 61713983. The next prime is 61713997. The reversal of 61713989 is 98931716.

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 61713989 - 2²⁰ = 60665413 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 (61713983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22379 + ... + 24984.

It is an arithmetic number, because the mean of its divisors is an integer number (15440664).

Almost surely, 2^61713989 is an apocalyptic number.

It is an amenable number.

61713989 is a deficient number, since it is larger than the sum of its proper divisors (48667).

61713989 is a wasteful number, since it uses less digits than its factorization.

61713989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48666.

The product of its digits is 81648, while the sum is 44.

The square root of 61713989 is about 7855.8251635331. The cubic root of 61713989 is about 395.1796202789.

The spelling of 61713989 in words is "sixty-one million, seven hundred thirteen thousand, nine hundred eighty-nine".