61782719 has 2 divisors, whose sum is σ = 61782720. Its totient is φ = 61782718.

The previous prime is 61782671. The next prime is 61782767. The reversal of 61782719 is 91728716.

It is a balanced prime because it is at equal distance from previous prime (61782671) and next prime (61782767).

It is a cyclic number.

It is not a de Polignac number, because 61782719 - 2⁸ = 61782463 is a prime.

It is a super-2 number, since 2×61782719² = 7634208734065922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61782779) 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 as a sum of consecutive naturals, namely, 30891359 + 30891360.

It is an arithmetic number, because the mean of its divisors is an integer number (30891360).

Almost surely, 2^61782719 is an apocalyptic number.

61782719 is a deficient number, since it is larger than the sum of its proper divisors (1).

61782719 is an equidigital number, since it uses as much as digits as its factorization.

61782719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 41.

The square root of 61782719 is about 7860.1984071651. The cubic root of 61782719 is about 395.3262678442.

The spelling of 61782719 in words is "sixty-one million, seven hundred eighty-two thousand, seven hundred nineteen".