61541879 has 4 divisors (see below), whose sum is σ = 70333584. Its totient is φ = 52750176.

The previous prime is 61541873. The next prime is 61541891. The reversal of 61541879 is 97814516.

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 61541879 - 2²⁴ = 44764663 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 (61541873) 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, 4395842 + ... + 4395855.

It is an arithmetic number, because the mean of its divisors is an integer number (17583396).

Almost surely, 2^61541879 is an apocalyptic number.

61541879 is a deficient number, since it is larger than the sum of its proper divisors (8791705).

61541879 is an equidigital number, since it uses as much as digits as its factorization.

61541879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8791704.

The product of its digits is 60480, while the sum is 41.

The square root of 61541879 is about 7844.8632237917. The cubic root of 61541879 is about 394.8119149412.

The spelling of 61541879 in words is "sixty-one million, five hundred forty-one thousand, eight hundred seventy-nine".