74068781 has 4 divisors (see below), whose sum is σ = 74401152. Its totient is φ = 73736412.

The previous prime is 74068759. The next prime is 74068811. The reversal of 74068781 is 18786047.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74068781 is a prime.

It is a super-2 number, since 2×74068781² = 10972368637651922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74068721) 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, 165851 + ... + 166296.

It is an arithmetic number, because the mean of its divisors is an integer number (18600288).

Almost surely, 2^74068781 is an apocalyptic number.

It is an amenable number.

74068781 is a deficient number, since it is larger than the sum of its proper divisors (332371).

74068781 is a wasteful number, since it uses less digits than its factorization.

74068781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332370.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 74068781 is about 8606.3221529292. The cubic root of 74068781 is about 419.9636797768.

The spelling of 74068781 in words is "seventy-four million, sixty-eight thousand, seven hundred eighty-one".