74304401 has 4 divisors (see below), whose sum is σ = 74322612. Its totient is φ = 74286192.

The previous prime is 74304389. The next prime is 74304403. The reversal of 74304401 is 10440347.

It is a Cunningham number, because it is equal to 8620²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10440347 = 109 ⋅95783.

It can be written as a sum of positive squares in 2 ways, for example, as 602176 + 73702225 = 776^2 + 8585^2 .

It is a cyclic number.

It is not a de Polignac number, because 74304401 - 2⁶ = 74304337 is a prime.

It is a super-2 number, since 2×74304401² = 11042288015937602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74304403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155 + ... + 12191.

It is an arithmetic number, because the mean of its divisors is an integer number (18580653).

Almost surely, 2^74304401 is an apocalyptic number.

It is an amenable number.

74304401 is a deficient number, since it is larger than the sum of its proper divisors (18211).

74304401 is a wasteful number, since it uses less digits than its factorization.

74304401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18210.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 74304401 is about 8620.0000580046. Note that the first 4 decimals coincide. The cubic root of 74304401 is about 420.4085235234.

Adding to 74304401 its reverse (10440347), we get a palindrome (84744748).

The spelling of 74304401 in words is "seventy-four million, three hundred four thousand, four hundred one".