61713993 has 24 divisors (see below), whose sum is σ = 91010304. Its totient is φ = 37169440.

The previous prime is 61713983. The next prime is 61713997. The reversal of 61713993 is 39931716.

It is not a de Polignac number, because 61713993 - 2¹⁴ = 61697609 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (61713997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71080 + ... + 71942.

It is an arithmetic number, because the mean of its divisors is an integer number (3792096).

Almost surely, 2^61713993 is an apocalyptic number.

It is an amenable number.

61713993 is a deficient number, since it is larger than the sum of its proper divisors (29296311).

61713993 is a wasteful number, since it uses less digits than its factorization.

61713993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085 (or 1074 counting only the distinct ones).

The product of its digits is 30618, while the sum is 39.

The square root of 61713993 is about 7855.8254181213. The cubic root of 61713993 is about 395.1796288167.

The spelling of 61713993 in words is "sixty-one million, seven hundred thirteen thousand, nine hundred ninety-three".