74350721 has 2 divisors, whose sum is σ = 74350722. Its totient is φ = 74350720.

The previous prime is 74350709. The next prime is 74350807. The reversal of 74350721 is 12705347.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74218225 + 132496 = 8615^2 + 364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74350721 is a prime.

It is not a weakly prime, because it can be changed into another prime (74350621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37175360 + 37175361.

It is an arithmetic number, because the mean of its divisors is an integer number (37175361).

Almost surely, 2^74350721 is an apocalyptic number.

It is an amenable number.

74350721 is a deficient number, since it is larger than the sum of its proper divisors (1).

74350721 is an equidigital number, since it uses as much as digits as its factorization.

74350721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 74350721 is about 8622.6864143375. The cubic root of 74350721 is about 420.4958636966.

The spelling of 74350721 in words is "seventy-four million, three hundred fifty thousand, seven hundred twenty-one".