74085881 has 4 divisors (see below), whose sum is σ = 78443892. Its totient is φ = 69727872.

The previous prime is 74085863. The next prime is 74085899. The reversal of 74085881 is 18858047.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18858047 = 13 ⋅1450619.

It is an interprime number because it is at equal distance from previous prime (74085863) and next prime (74085899).

It can be written as a sum of positive squares in 2 ways, for example, as 27040000 + 47045881 = 5200^2 + 6859^2 .

It is a cyclic number.

It is not a de Polignac number, because 74085881 - 2¹⁴ = 74069497 is a prime.

It is a super-2 number, since 2×74085881² = 10977435527092322, 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 (74085821) 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, 2178980 + ... + 2179013.

It is an arithmetic number, because the mean of its divisors is an integer number (19610973).

Almost surely, 2^74085881 is an apocalyptic number.

It is an amenable number.

74085881 is a deficient number, since it is larger than the sum of its proper divisors (4358011).

74085881 is a wasteful number, since it uses less digits than its factorization.

74085881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4358010.

The product of its (nonzero) digits is 71680, while the sum is 41.

The square root of 74085881 is about 8607.3155513203. The cubic root of 74085881 is about 419.9959958046.

The spelling of 74085881 in words is "seventy-four million, eighty-five thousand, eight hundred eighty-one".