61559117 has 4 divisors (see below), whose sum is σ = 61648896. Its totient is φ = 61469340.

The previous prime is 61559111. The next prime is 61559119. The reversal of 61559117 is 71195516.

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 not a de Polignac number, because 61559117 - 2¹⁰ = 61558093 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 (61559111) 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, 43853 + ... + 45234.

It is an arithmetic number, because the mean of its divisors is an integer number (15412224).

Almost surely, 2^61559117 is an apocalyptic number.

It is an amenable number.

61559117 is a deficient number, since it is larger than the sum of its proper divisors (89779).

61559117 is an equidigital number, since it uses as much as digits as its factorization.

61559117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89778.

The product of its digits is 9450, while the sum is 35.

The square root of 61559117 is about 7845.9618275900. The cubic root of 61559117 is about 394.8487740284.

The spelling of 61559117 in words is "sixty-one million, five hundred fifty-nine thousand, one hundred seventeen".