4345639 has 2 divisors, whose sum is σ = 4345640. Its totient is φ = 4345638.

The previous prime is 4345633. The next prime is 4345651. The reversal of 4345639 is 9365434.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4345639 - 2⁷ = 4345511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4345633) 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 as a sum of consecutive naturals, namely, 2172819 + 2172820.

It is an arithmetic number, because the mean of its divisors is an integer number (2172820).

Almost surely, 2^4345639 is an apocalyptic number.

4345639 is a deficient number, since it is larger than the sum of its proper divisors (1).

4345639 is an equidigital number, since it uses as much as digits as its factorization.

4345639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 34.

The square root of 4345639 is about 2084.6196295727. The cubic root of 4345639 is about 163.1866205351.

The spelling of 4345639 in words is "four million, three hundred forty-five thousand, six hundred thirty-nine".