34077821 has 2 divisors, whose sum is σ = 34077822. Its totient is φ = 34077820.

The previous prime is 34077803. The next prime is 34077907. The reversal of 34077821 is 12877043.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32649796 + 1428025 = 5714^2 + 1195^2 .

It is a cyclic number.

It is not a de Polignac number, because 34077821 - 2¹⁰ = 34076797 is a prime.

It is a super-2 number, since 2×34077821² = 2322595768216082, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34077221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17038910 + 17038911.

It is an arithmetic number, because the mean of its divisors is an integer number (17038911).

Almost surely, 2^34077821 is an apocalyptic number.

It is an amenable number.

34077821 is a deficient number, since it is larger than the sum of its proper divisors (1).

34077821 is an equidigital number, since it uses as much as digits as its factorization.

34077821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 34077821 is about 5837.6211764725. The cubic root of 34077821 is about 324.2081582912.

The spelling of 34077821 in words is "thirty-four million, seventy-seven thousand, eight hundred twenty-one".