675839681 has 4 divisors (see below), whose sum is σ = 737279664. Its totient is φ = 614399700.

The previous prime is 675839639. The next prime is 675839687. The reversal of 675839681 is 186938576.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 675839681 - 2²⁶ = 608730817 is a prime.

It is a super-2 number, since 2×675839681² = 913518548828363522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (675839687) 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 in 3 ways as a sum of consecutive naturals, for example, 30719975 + ... + 30719996.

It is an arithmetic number, because the mean of its divisors is an integer number (184319916).

Almost surely, 2^675839681 is an apocalyptic number.

It is an amenable number.

675839681 is a deficient number, since it is larger than the sum of its proper divisors (61439983).

675839681 is a wasteful number, since it uses less digits than its factorization.

675839681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61439982.

The product of its digits is 2177280, while the sum is 53.

The square root of 675839681 is about 25996.9167594928. The cubic root of 675839681 is about 877.5689103168.

The spelling of 675839681 in words is "six hundred seventy-five million, eight hundred thirty-nine thousand, six hundred eighty-one".