34784921 has 6 divisors (see below), whose sum is σ = 35751870. Its totient is φ = 33843456.

The previous prime is 34784917. The next prime is 34784923. The reversal of 34784921 is 12948743.

It can be written as a sum of positive squares in 3 ways, for example, as 11155600 + 23629321 = 3340^2 + 4861^2 .

It is not a de Polignac number, because 34784921 - 2² = 34784917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34784923) 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 in 5 ways as a sum of consecutive naturals, for example, 11336 + ... + 14073.

It is an arithmetic number, because the mean of its divisors is an integer number (5958645).

Almost surely, 2^34784921 is an apocalyptic number.

It is an amenable number.

34784921 is a deficient number, since it is larger than the sum of its proper divisors (966949).

34784921 is an equidigital number, since it uses as much as digits as its factorization.

34784921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25483 (or 25446 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 34784921 is about 5897.8742780768. The cubic root of 34784921 is about 326.4352179546.

The spelling of 34784921 in words is "thirty-four million, seven hundred eighty-four thousand, nine hundred twenty-one".