74569721 has 4 divisors (see below), whose sum is σ = 74923344. Its totient is φ = 74216100.

The previous prime is 74569681. The next prime is 74569741. The reversal of 74569721 is 12796547.

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 74569721 - 2²⁶ = 7460857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74569741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176495 + ... + 176916.

It is an arithmetic number, because the mean of its divisors is an integer number (18730836).

Almost surely, 2^74569721 is an apocalyptic number.

It is an amenable number.

74569721 is a deficient number, since it is larger than the sum of its proper divisors (353623).

74569721 is a wasteful number, since it uses less digits than its factorization.

74569721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353622.

The product of its digits is 105840, while the sum is 41.

The square root of 74569721 is about 8635.3761354095. The cubic root of 74569721 is about 420.9083157659.

The spelling of 74569721 in words is "seventy-four million, five hundred sixty-nine thousand, seven hundred twenty-one".