74433509 has 2 divisors, whose sum is σ = 74433510. Its totient is φ = 74433508.

The previous prime is 74433503. The next prime is 74433547. The reversal of 74433509 is 90533447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72624484 + 1809025 = 8522^2 + 1345^2 .

It is a cyclic number.

It is not a de Polignac number, because 74433509 - 2⁴ = 74433493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74433503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37216754 + 37216755.

It is an arithmetic number, because the mean of its divisors is an integer number (37216755).

Almost surely, 2^74433509 is an apocalyptic number.

It is an amenable number.

74433509 is a deficient number, since it is larger than the sum of its proper divisors (1).

74433509 is an equidigital number, since it uses as much as digits as its factorization.

74433509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 74433509 is about 8627.4856708082. The cubic root of 74433509 is about 420.6518769729.

The spelling of 74433509 in words is "seventy-four million, four hundred thirty-three thousand, five hundred nine".