674435639 has 2 divisors, whose sum is σ = 674435640. Its totient is φ = 674435638.

The previous prime is 674435633. The next prime is 674435711. The reversal of 674435639 is 936534476.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 674435639 - 2⁴ = 674435623 is a prime.

It is equal to p_34996493 and since 674435639 and 34996493 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 674435593 and 674435602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (674435633) 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 as a sum of consecutive naturals, namely, 337217819 + 337217820.

It is an arithmetic number, because the mean of its divisors is an integer number (337217820).

Almost surely, 2^674435639 is an apocalyptic number.

674435639 is a deficient number, since it is larger than the sum of its proper divisors (1).

674435639 is an equidigital number, since it uses as much as digits as its factorization.

674435639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 47.

The square root of 674435639 is about 25969.8987098525. The cubic root of 674435639 is about 876.9607789906.

The spelling of 674435639 in words is "six hundred seventy-four million, four hundred thirty-five thousand, six hundred thirty-nine".