61679479 has 4 divisors (see below), whose sum is σ = 62690680. Its totient is φ = 60668280.

The previous prime is 61679477. The next prime is 61679489. The reversal of 61679479 is 97497616.

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 61679479 - 2¹ = 61679477 is a prime.

It is a super-2 number, since 2×61679479² = 7608716259422882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61679477) 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, 505509 + ... + 505630.

It is an arithmetic number, because the mean of its divisors is an integer number (15672670).

Almost surely, 2^61679479 is an apocalyptic number.

61679479 is a deficient number, since it is larger than the sum of its proper divisors (1011201).

61679479 is a wasteful number, since it uses less digits than its factorization.

61679479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011200.

The product of its digits is 571536, while the sum is 49.

The square root of 61679479 is about 7853.6283971168. The cubic root of 61679479 is about 395.1059460507.

The spelling of 61679479 in words is "sixty-one million, six hundred seventy-nine thousand, four hundred seventy-nine".