61286879 has 2 divisors, whose sum is σ = 61286880. Its totient is φ = 61286878.

The previous prime is 61286873. The next prime is 61286893. The reversal of 61286879 is 97868216.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61286879 - 2⁸ = 61286623 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61286873) 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 as a sum of consecutive naturals, namely, 30643439 + 30643440.

It is an arithmetic number, because the mean of its divisors is an integer number (30643440).

Almost surely, 2^61286879 is an apocalyptic number.

61286879 is a deficient number, since it is larger than the sum of its proper divisors (1).

61286879 is an equidigital number, since it uses as much as digits as its factorization.

61286879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 47.

The square root of 61286879 is about 7828.5936795826. The cubic root of 61286879 is about 394.2658563690.

The spelling of 61286879 in words is "sixty-one million, two hundred eighty-six thousand, eight hundred seventy-nine".