61717479 has 8 divisors (see below), whose sum is σ = 82422912. Its totient is φ = 41078520.

The previous prime is 61717471. The next prime is 61717483. The reversal of 61717479 is 97471716.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61717479 - 2³ = 61717471 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61717479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61717471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14409 + ... + 18194.

It is an arithmetic number, because the mean of its divisors is an integer number (10302864).

Almost surely, 2^61717479 is an apocalyptic number.

61717479 is a deficient number, since it is larger than the sum of its proper divisors (20705433).

61717479 is a wasteful number, since it uses less digits than its factorization.

61717479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33237.

The product of its digits is 74088, while the sum is 42.

The square root of 61717479 is about 7856.0472885542. The cubic root of 61717479 is about 395.1870694321.

The spelling of 61717479 in words is "sixty-one million, seven hundred seventeen thousand, four hundred seventy-nine".