61724617 has 4 divisors (see below), whose sum is σ = 64408320. Its totient is φ = 59040916.

The previous prime is 61724599. The next prime is 61724623. The reversal of 61724617 is 71642716.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-61724617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61724647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1341817 + ... + 1341862.

It is an arithmetic number, because the mean of its divisors is an integer number (16102080).

Almost surely, 2^61724617 is an apocalyptic number.

It is an amenable number.

61724617 is a deficient number, since it is larger than the sum of its proper divisors (2683703).

61724617 is a wasteful number, since it uses less digits than its factorization.

61724617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2683702.

The product of its digits is 14112, while the sum is 34.

The square root of 61724617 is about 7856.5015751287. The cubic root of 61724617 is about 395.2023041036.

The spelling of 61724617 in words is "sixty-one million, seven hundred twenty-four thousand, six hundred seventeen".