34928221 has 2 divisors, whose sum is σ = 34928222. Its totient is φ = 34928220.

The previous prime is 34928207. The next prime is 34928233. The reversal of 34928221 is 12282943.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34928100 + 121 = 5910^2 + 11^2 .

It is a cyclic number.

It is not a de Polignac number, because 34928221 - 2⁵ = 34928189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34928321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17464110 + 17464111.

It is an arithmetic number, because the mean of its divisors is an integer number (17464111).

Almost surely, 2^34928221 is an apocalyptic number.

It is an amenable number.

34928221 is a deficient number, since it is larger than the sum of its proper divisors (1).

34928221 is an equidigital number, since it uses as much as digits as its factorization.

34928221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 31.

The square root of 34928221 is about 5910.0102368778. The cubic root of 34928221 is about 326.8828647721.

The spelling of 34928221 in words is "thirty-four million, nine hundred twenty-eight thousand, two hundred twenty-one".