61247579 has 2 divisors, whose sum is σ = 61247580. Its totient is φ = 61247578.

The previous prime is 61247573. The next prime is 61247629. The reversal of 61247579 is 97574216.

61247579 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61247579 - 2²⁰ = 60199003 is a prime.

It is a super-2 number, since 2×61247579² = 7502531866722482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61247573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30623789 + 30623790.

It is an arithmetic number, because the mean of its divisors is an integer number (30623790).

Almost surely, 2^61247579 is an apocalyptic number.

61247579 is a deficient number, since it is larger than the sum of its proper divisors (1).

61247579 is an equidigital number, since it uses as much as digits as its factorization.

61247579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The square root of 61247579 is about 7826.0832477044. The cubic root of 61247579 is about 394.1815644752.

The spelling of 61247579 in words is "sixty-one million, two hundred forty-seven thousand, five hundred seventy-nine".