34686921 has 16 divisors (see below), whose sum is σ = 48458880. Its totient is φ = 22028160.

The previous prime is 34686917. The next prime is 34686931. The reversal of 34686921 is 12968643.

It is not a de Polignac number, because 34686921 - 2² = 34686917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 34686921.

It is not an unprimeable number, because it can be changed into a prime (34686931) 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 15 ways as a sum of consecutive naturals, for example, 18495 + ... + 20283.

It is an arithmetic number, because the mean of its divisors is an integer number (3028680).

Almost surely, 2^34686921 is an apocalyptic number.

It is an amenable number.

34686921 is a deficient number, since it is larger than the sum of its proper divisors (13771959).

34686921 is a wasteful number, since it uses less digits than its factorization.

34686921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096.

The product of its digits is 62208, while the sum is 39.

The square root of 34686921 is about 5889.5603401273. The cubic root of 34686921 is about 326.1283729184.

The spelling of 34686921 in words is "thirty-four million, six hundred eighty-six thousand, nine hundred twenty-one".