61017679 has 4 divisors (see below), whose sum is σ = 61127784. Its totient is φ = 60907576.

The previous prime is 61017667. The next prime is 61017739. The reversal of 61017679 is 97671016.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61017679 - 2⁵ = 61017647 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 (61017659) 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, 54217 + ... + 55330.

It is an arithmetic number, because the mean of its divisors is an integer number (15281946).

Almost surely, 2^61017679 is an apocalyptic number.

61017679 is a deficient number, since it is larger than the sum of its proper divisors (110105).

61017679 is a wasteful number, since it uses less digits than its factorization.

61017679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110104.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 61017679 is about 7811.3813759155. The cubic root of 61017679 is about 393.6877437810.

The spelling of 61017679 in words is "sixty-one million, seventeen thousand, six hundred seventy-nine".