74992309 has 8 divisors (see below), whose sum is σ = 85912448. Its totient is φ = 64123920.

The previous prime is 74992283. The next prime is 74992331. The reversal of 74992309 is 90329947.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74992309 - 2⁵ = 74992277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74992339) 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 7 ways as a sum of consecutive naturals, for example, 9777 + ... + 15670.

It is an arithmetic number, because the mean of its divisors is an integer number (10739056).

Almost surely, 2^74992309 is an apocalyptic number.

It is an amenable number.

74992309 is a deficient number, since it is larger than the sum of its proper divisors (10920139).

74992309 is a wasteful number, since it uses less digits than its factorization.

74992309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25875.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 74992309 is about 8659.8099863681. The cubic root of 74992309 is about 421.7019169567.

The spelling of 74992309 in words is "seventy-four million, nine hundred ninety-two thousand, three hundred nine".