34307921 has 4 divisors (see below), whose sum is σ = 36326052. Its totient is φ = 32289792.

The previous prime is 34307909. The next prime is 34307947. The reversal of 34307921 is 12970343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12970343 = 3067 ⋅4229.

It can be written as a sum of positive squares in 2 ways, for example, as 25897921 + 8410000 = 5089^2 + 2900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34307921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (34307971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1009040 + ... + 1009073.

It is an arithmetic number, because the mean of its divisors is an integer number (9081513).

Almost surely, 2^34307921 is an apocalyptic number.

It is an amenable number.

34307921 is a deficient number, since it is larger than the sum of its proper divisors (2018131).

34307921 is a wasteful number, since it uses less digits than its factorization.

34307921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018130.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 34307921 is about 5857.2963899738. The cubic root of 34307921 is about 324.9362273293.

The spelling of 34307921 in words is "thirty-four million, three hundred seven thousand, nine hundred twenty-one".