74209897 has 4 divisors (see below), whose sum is σ = 74708100. Its totient is φ = 73711696.

The previous prime is 74209871. The next prime is 74209903. The reversal of 74209897 is 79890247.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43507216 + 30702681 = 6596^2 + 5541^2 .

It is a cyclic number.

It is not a de Polignac number, because 74209897 - 2⁷ = 74209769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74209847) 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, 248878 + ... + 249175.

It is an arithmetic number, because the mean of its divisors is an integer number (18677025).

Almost surely, 2^74209897 is an apocalyptic number.

It is an amenable number.

74209897 is a deficient number, since it is larger than the sum of its proper divisors (498203).

74209897 is a wasteful number, since it uses less digits than its factorization.

74209897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498202.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 74209897 is about 8614.5166434339. The cubic root of 74209897 is about 420.2302158138.

The spelling of 74209897 in words is "seventy-four million, two hundred nine thousand, eight hundred ninety-seven".