61861079 has 24 divisors (see below), whose sum is σ = 77133600. Its totient is φ = 49420224.

The previous prime is 61861061. The next prime is 61861081. The reversal of 61861079 is 97016816.

It is not a de Polignac number, because 61861079 - 2¹² = 61856983 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 (61861049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 600542 + ... + 600644.

It is an arithmetic number, because the mean of its divisors is an integer number (3213900).

Almost surely, 2^61861079 is an apocalyptic number.

61861079 is a deficient number, since it is larger than the sum of its proper divisors (15272521).

61861079 is an equidigital number, since it uses as much as digits as its factorization.

61861079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 61861079 is about 7865.1814346524. The cubic root of 61861079 is about 395.4933300883.

The spelling of 61861079 in words is "sixty-one million, eight hundred sixty-one thousand, seventy-nine".