74782769 has 2 divisors, whose sum is σ = 74782770. Its totient is φ = 74782768.

The previous prime is 74782759. The next prime is 74782801. The reversal of 74782769 is 96728747.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74166544 + 616225 = 8612^2 + 785^2 .

It is an emirp because it is prime and its reverse (96728747) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74782769 - 2¹⁶ = 74717233 is a prime.

It is a super-2 number, since 2×74782769² = 11184925078614722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74782739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37391384 + 37391385.

It is an arithmetic number, because the mean of its divisors is an integer number (37391385).

Almost surely, 2^74782769 is an apocalyptic number.

It is an amenable number.

74782769 is a deficient number, since it is larger than the sum of its proper divisors (1).

74782769 is an equidigital number, since it uses as much as digits as its factorization.

74782769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1185408, while the sum is 50.

The square root of 74782769 is about 8647.7031054494. The cubic root of 74782769 is about 421.3087839845.

The spelling of 74782769 in words is "seventy-four million, seven hundred eighty-two thousand, seven hundred sixty-nine".