61163959 has 4 divisors (see below), whose sum is σ = 61179840. Its totient is φ = 61148080.

The previous prime is 61163911. The next prime is 61163981. The reversal of 61163959 is 95936116.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 61163959 - 2¹¹ = 61161911 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61163359) 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, 1914 + ... + 11224.

It is an arithmetic number, because the mean of its divisors is an integer number (15294960).

It is a vampire number, since it can be written as 6569 ⋅ 9311 (with its own digits).

Almost surely, 2^61163959 is an apocalyptic number.

61163959 is a deficient number, since it is larger than the sum of its proper divisors (15881).

61163959 is an equidigital number, since it uses as much as digits as its factorization.

61163959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15880.

The product of its digits is 43740, while the sum is 40.

The square root of 61163959 is about 7820.7390315750. The cubic root of 61163959 is about 394.0020935754.

The spelling of 61163959 in words is "sixty-one million, one hundred sixty-three thousand, nine hundred fifty-nine".