674721738539 has 2 divisors, whose sum is σ = 674721738540. Its totient is φ = 674721738538.

The previous prime is 674721738533. The next prime is 674721738673. The reversal of 674721738539 is 935837127476.

It is a happy number.

674721738539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-674721738539 is a prime.

It is not a weakly prime, because it can be changed into another prime (674721738533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337360869269 + 337360869270.

It is an arithmetic number, because the mean of its divisors is an integer number (337360869270).

Almost surely, 2^674721738539 is an apocalyptic number.

674721738539 is a deficient number, since it is larger than the sum of its proper divisors (1).

674721738539 is an equidigital number, since it uses as much as digits as its factorization.

674721738539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53343360, while the sum is 62.

The spelling of 674721738539 in words is "six hundred seventy-four billion, seven hundred twenty-one million, seven hundred thirty-eight thousand, five hundred thirty-nine".