74385909 has 12 divisors (see below), whose sum is σ = 115711596. Its totient is φ = 45775872.

The previous prime is 74385907. The next prime is 74385911. The reversal of 74385909 is 90958347.

It is an interprime number because it is at equal distance from previous prime (74385907) and next prime (74385911).

It can be written as a sum of positive squares in 2 ways, for example, as 5130225 + 69255684 = 2265^2 + 8322^2 .

It is not a de Polignac number, because 74385909 - 2¹ = 74385907 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74385907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 317772 + ... + 318005.

It is an arithmetic number, because the mean of its divisors is an integer number (9642633).

Almost surely, 2^74385909 is an apocalyptic number.

It is an amenable number.

74385909 is a deficient number, since it is larger than the sum of its proper divisors (41325687).

74385909 is a wasteful number, since it uses less digits than its factorization.

74385909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635796 (or 635793 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 74385909 is about 8624.7266043626. The cubic root of 74385909 is about 420.5621893248.

The spelling of 74385909 in words is "seventy-four million, three hundred eighty-five thousand, nine hundred nine".