74018641 has 4 divisors (see below), whose sum is σ = 74710512. Its totient is φ = 73326772.

The previous prime is 74018639. The next prime is 74018657. The reversal of 74018641 is 14681047.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74018641 - 2¹ = 74018639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74018671) 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, 345775 + ... + 345988.

It is an arithmetic number, because the mean of its divisors is an integer number (18677628).

Almost surely, 2^74018641 is an apocalyptic number.

It is an amenable number.

74018641 is a deficient number, since it is larger than the sum of its proper divisors (691871).

74018641 is a wasteful number, since it uses less digits than its factorization.

74018641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691870.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 74018641 is about 8603.4086849341. The cubic root of 74018641 is about 419.8688952093.

Adding to 74018641 its reverse (14681047), we get a palindrome (88699688).

The spelling of 74018641 in words is "seventy-four million, eighteen thousand, six hundred forty-one".