74009081 has 4 divisors (see below), whose sum is σ = 74026752. Its totient is φ = 73991412.

The previous prime is 74009077. The next prime is 74009083. The reversal of 74009081 is 18090047.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18090047 = 523 ⋅34589.

It is a cyclic number.

It is not a de Polignac number, because 74009081 - 2² = 74009077 is a prime.

It is a super-2 number, since 2×74009081² = 10954688140929122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74009083) 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, 1400 + ... + 12246.

It is an arithmetic number, because the mean of its divisors is an integer number (18506688).

Almost surely, 2^74009081 is an apocalyptic number.

It is an amenable number.

74009081 is a deficient number, since it is larger than the sum of its proper divisors (17671).

74009081 is a wasteful number, since it uses less digits than its factorization.

74009081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17670.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 74009081 is about 8602.8530732542. The cubic root of 74009081 is about 419.8508181439.

The spelling of 74009081 in words is "seventy-four million, nine thousand, eighty-one".