74246309 has 4 divisors (see below), whose sum is σ = 76253004. Its totient is φ = 72239616.

The previous prime is 74246287. The next prime is 74246317. The reversal of 74246309 is 90364247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90364247 = 19 ⋅4756013.

It can be written as a sum of positive squares in 2 ways, for example, as 61622500 + 12623809 = 7850^2 + 3553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74246309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74246339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1003292 + ... + 1003365.

It is an arithmetic number, because the mean of its divisors is an integer number (19063251).

Almost surely, 2^74246309 is an apocalyptic number.

It is an amenable number.

74246309 is a deficient number, since it is larger than the sum of its proper divisors (2006695).

74246309 is a wasteful number, since it uses less digits than its factorization.

74246309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006694.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 74246309 is about 8616.6297936026. The cubic root of 74246309 is about 420.2989349528.

The spelling of 74246309 in words is "seventy-four million, two hundred forty-six thousand, three hundred nine".