74231809 has 4 divisors (see below), whose sum is σ = 78598404. Its totient is φ = 69865216.

The previous prime is 74231761. The next prime is 74231819. The reversal of 74231809 is 90813247.

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 29942784 + 44289025 = 5472^2 + 6655^2 .

It is a cyclic number.

It is not a de Polignac number, because 74231809 - 2¹⁷ = 74100737 is a prime.

It is a super-2 number, since 2×74231809² = 11020722934824962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74231819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2183272 + ... + 2183305.

It is an arithmetic number, because the mean of its divisors is an integer number (19649601).

Almost surely, 2^74231809 is an apocalyptic number.

It is an amenable number.

74231809 is a deficient number, since it is larger than the sum of its proper divisors (4366595).

74231809 is a wasteful number, since it uses less digits than its factorization.

74231809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4366594.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 74231809 is about 8615.7883562678. The cubic root of 74231809 is about 420.2715722847.

The spelling of 74231809 in words is "seventy-four million, two hundred thirty-one thousand, eight hundred nine".