33874681 has 2 divisors, whose sum is σ = 33874682. Its totient is φ = 33874680.

The previous prime is 33874679. The next prime is 33874691. The reversal of 33874681 is 18647833.

33874681 = 4115² + 4116².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16941456 + 16933225 = 4116^2 + 4115^2 .

It is a cyclic number.

It is not a de Polignac number, because 33874681 - 2¹ = 33874679 is a prime.

It is a super-2 number, since 2×33874681² = 2294988025703522, which contains 22 as substring.

Together with 33874679, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (33874601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16937340 + 16937341.

It is an arithmetic number, because the mean of its divisors is an integer number (16937341).

Almost surely, 2^33874681 is an apocalyptic number.

33874681 is the 4116-th centered square number.

It is an amenable number.

33874681 is a deficient number, since it is larger than the sum of its proper divisors (1).

33874681 is an equidigital number, since it uses as much as digits as its factorization.

33874681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 40.

The square root of 33874681 is about 5820.1959589004. The cubic root of 33874681 is about 323.5626656812.

The spelling of 33874681 in words is "thirty-three million, eight hundred seventy-four thousand, six hundred eighty-one".