74198669 has 2 divisors, whose sum is σ = 74198670. Its totient is φ = 74198668.

The previous prime is 74198651. The next prime is 74198689. The reversal of 74198669 is 96689147.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57957769 + 16240900 = 7613^2 + 4030^2 .

It is an emirp because it is prime and its reverse (96689147) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74198669 is a prime.

It is a super-2 number, since 2×74198669² = 11010884962743122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74198639) 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, 37099334 + 37099335.

It is an arithmetic number, because the mean of its divisors is an integer number (37099335).

Almost surely, 2^74198669 is an apocalyptic number.

It is an amenable number.

74198669 is a deficient number, since it is larger than the sum of its proper divisors (1).

74198669 is an equidigital number, since it uses as much as digits as its factorization.

74198669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The square root of 74198669 is about 8613.8649281260. The cubic root of 74198669 is about 420.2090210539.

The spelling of 74198669 in words is "seventy-four million, one hundred ninety-eight thousand, six hundred sixty-nine".