434623639 has 2 divisors, whose sum is σ = 434623640. Its totient is φ = 434623638.

The previous prime is 434623619. The next prime is 434623669. The reversal of 434623639 is 936326434.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 434623639 - 2¹¹ = 434621591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434623619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217311819 + 217311820.

It is an arithmetic number, because the mean of its divisors is an integer number (217311820).

Almost surely, 2^434623639 is an apocalyptic number.

434623639 is a deficient number, since it is larger than the sum of its proper divisors (1).

434623639 is an equidigital number, since it uses as much as digits as its factorization.

434623639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 40.

The square root of 434623639 is about 20847.6290978135. The cubic root of 434623639 is about 757.4799024538.

The spelling of 434623639 in words is "four hundred thirty-four million, six hundred twenty-three thousand, six hundred thirty-nine".