74821969 has 2 divisors, whose sum is σ = 74821970. Its totient is φ = 74821968.

The previous prime is 74821963. The next prime is 74821991. The reversal of 74821969 is 96912847.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70761744 + 4060225 = 8412^2 + 2015^2 .

It is a cyclic number.

It is not a de Polignac number, because 74821969 - 2⁵ = 74821937 is a prime.

It is a super-2 number, since 2×74821969² = 11196654090073922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74821963) 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, 37410984 + 37410985.

It is an arithmetic number, because the mean of its divisors is an integer number (37410985).

Almost surely, 2^74821969 is an apocalyptic number.

It is an amenable number.

74821969 is a deficient number, since it is larger than the sum of its proper divisors (1).

74821969 is an equidigital number, since it uses as much as digits as its factorization.

74821969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 46.

The square root of 74821969 is about 8649.9693063039. The cubic root of 74821969 is about 421.3823856965.

The spelling of 74821969 in words is "seventy-four million, eight hundred twenty-one thousand, nine hundred sixty-nine".