61803979 has 8 divisors (see below), whose sum is σ = 65129040. Its totient is φ = 58486176.

The previous prime is 61803961. The next prime is 61804019. The reversal of 61803979 is 97930816.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61803979 - 2⁵ = 61803947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61803779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31989 + ... + 33865.

It is an arithmetic number, because the mean of its divisors is an integer number (8141130).

Almost surely, 2^61803979 is an apocalyptic number.

61803979 is a deficient number, since it is larger than the sum of its proper divisors (3325061).

61803979 is a wasteful number, since it uses less digits than its factorization.

61803979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3629.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 61803979 is about 7861.5506740083. The cubic root of 61803979 is about 395.3716077750.

The spelling of 61803979 in words is "sixty-one million, eight hundred three thousand, nine hundred seventy-nine".