34904021 has 4 divisors (see below), whose sum is σ = 34927200. Its totient is φ = 34880844.

The previous prime is 34903993. The next prime is 34904029. The reversal of 34904021 is 12040943.

34904021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12040943 = 79 ⋅152417.

It is a cyclic number.

It is not a de Polignac number, because 34904021 - 2¹⁰ = 34902997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34904029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9161 + ... + 12398.

It is an arithmetic number, because the mean of its divisors is an integer number (8731800).

Almost surely, 2^34904021 is an apocalyptic number.

It is an amenable number.

34904021 is a deficient number, since it is larger than the sum of its proper divisors (23179).

34904021 is a wasteful number, since it uses less digits than its factorization.

34904021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23178.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 34904021 is about 5907.9625083441. The cubic root of 34904021 is about 326.8073537884.

Adding to 34904021 its reverse (12040943), we get a palindrome (46944964).

The spelling of 34904021 in words is "thirty-four million, nine hundred four thousand, twenty-one".