61057769 has 2 divisors, whose sum is σ = 61057770. Its totient is φ = 61057768.

The previous prime is 61057753. The next prime is 61057793. The reversal of 61057769 is 96775016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57942544 + 3115225 = 7612^2 + 1765^2 .

It is a cyclic number.

It is not a de Polignac number, because 61057769 - 2⁴ = 61057753 is a prime.

It is a super-2 number, since 2×61057769² = 7456102310514722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61057729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30528884 + 30528885.

It is an arithmetic number, because the mean of its divisors is an integer number (30528885).

Almost surely, 2^61057769 is an apocalyptic number.

It is an amenable number.

61057769 is a deficient number, since it is larger than the sum of its proper divisors (1).

61057769 is an equidigital number, since it uses as much as digits as its factorization.

61057769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 61057769 is about 7813.9470819810. The cubic root of 61057769 is about 393.7739454993.

The spelling of 61057769 in words is "sixty-one million, fifty-seven thousand, seven hundred sixty-nine".