61672179 has 4 divisors (see below), whose sum is σ = 82229576. Its totient is φ = 41114784.

The previous prime is 61672151. The next prime is 61672189. The reversal of 61672179 is 97127616.

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

It is not a de Polignac number, because 61672179 - 2²⁰ = 60623603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61672109) 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, 10278694 + ... + 10278699.

It is an arithmetic number, because the mean of its divisors is an integer number (20557394).

Almost surely, 2^61672179 is an apocalyptic number.

61672179 is a deficient number, since it is larger than the sum of its proper divisors (20557397).

61672179 is a wasteful number, since it uses less digits than its factorization.

61672179 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20557396.

The product of its digits is 31752, while the sum is 39.

The square root of 61672179 is about 7853.1636300283. The cubic root of 61672179 is about 395.0903580073.

The spelling of 61672179 in words is "sixty-one million, six hundred seventy-two thousand, one hundred seventy-nine".