34737821 has 2 divisors, whose sum is σ = 34737822. Its totient is φ = 34737820.

The previous prime is 34737809. The next prime is 34737869. The reversal of 34737821 is 12873743.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32649796 + 2088025 = 5714^2 + 1445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34737821 is a prime.

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 (34737221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17368910 + 17368911.

It is an arithmetic number, because the mean of its divisors is an integer number (17368911).

Almost surely, 2^34737821 is an apocalyptic number.

It is an amenable number.

34737821 is a deficient number, since it is larger than the sum of its proper divisors (1).

34737821 is an equidigital number, since it uses as much as digits as its factorization.

34737821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 34737821 is about 5893.8799614515. The cubic root of 34737821 is about 326.2878165038.

The spelling of 34737821 in words is "thirty-four million, seven hundred thirty-seven thousand, eight hundred twenty-one".