34639021 has 4 divisors (see below), whose sum is σ = 35833500. Its totient is φ = 33444544.

The previous prime is 34639019. The next prime is 34639027. The reversal of 34639021 is 12093643.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8934121 + 25704900 = 2989^2 + 5070^2 .

It is a cyclic number.

It is not a de Polignac number, because 34639021 - 2¹ = 34639019 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 (34639027) 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, 597196 + ... + 597253.

It is an arithmetic number, because the mean of its divisors is an integer number (8958375).

Almost surely, 2^34639021 is an apocalyptic number.

It is an amenable number.

34639021 is a deficient number, since it is larger than the sum of its proper divisors (1194479).

34639021 is a wasteful number, since it uses less digits than its factorization.

34639021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194478.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 34639021 is about 5885.4924178016. The cubic root of 34639021 is about 325.9781842704.

The spelling of 34639021 in words is "thirty-four million, six hundred thirty-nine thousand, twenty-one".