74240729 has 2 divisors, whose sum is σ = 74240730. Its totient is φ = 74240728.

The previous prime is 74240723. The next prime is 74240737. The reversal of 74240729 is 92704247.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66667225 + 7573504 = 8165^2 + 2752^2 .

It is a cyclic number.

It is not a de Polignac number, because 74240729 - 2⁸ = 74240473 is a prime.

It is not a weakly prime, because it can be changed into another prime (74240723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37120364 + 37120365.

It is an arithmetic number, because the mean of its divisors is an integer number (37120365).

Almost surely, 2^74240729 is an apocalyptic number.

It is an amenable number.

74240729 is a deficient number, since it is larger than the sum of its proper divisors (1).

74240729 is an equidigital number, since it uses as much as digits as its factorization.

74240729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 74240729 is about 8616.3059950306. The cubic root of 74240729 is about 420.2884054650.

The spelling of 74240729 in words is "seventy-four million, two hundred forty thousand, seven hundred twenty-nine".