74408641 has 4 divisors (see below), whose sum is σ = 74794372. Its totient is φ = 74022912.

The previous prime is 74408629. The next prime is 74408683. The reversal of 74408641 is 14680447.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14680447 = 109 ⋅134683.

It can be written as a sum of positive squares in 2 ways, for example, as 37454400 + 36954241 = 6120^2 + 6079^2 .

It is a cyclic number.

It is not a de Polignac number, because 74408641 - 2¹⁹ = 73884353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74408597 and 74408606.

It is not an unprimeable number, because it can be changed into a prime (74408041) 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 in 3 ways as a sum of consecutive naturals, for example, 192576 + ... + 192961.

It is an arithmetic number, because the mean of its divisors is an integer number (18698593).

Almost surely, 2^74408641 is an apocalyptic number.

It is an amenable number.

74408641 is a deficient number, since it is larger than the sum of its proper divisors (385731).

74408641 is a wasteful number, since it uses less digits than its factorization.

74408641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385730.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 74408641 is about 8626.0443425709. The cubic root of 74408641 is about 420.6050256009.

The spelling of 74408641 in words is "seventy-four million, four hundred eight thousand, six hundred forty-one".