681533413 has 8 divisors (see below), whose sum is σ = 757519776. Its totient is φ = 607885200.

The previous prime is 681533407. The next prime is 681533429. The reversal of 681533413 is 314335186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 681533413 - 2⁵ = 681533381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681533453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 583923 + ... + 585088.

It is an arithmetic number, because the mean of its divisors is an integer number (94689972).

Almost surely, 2^681533413 is an apocalyptic number.

It is an amenable number.

681533413 is a deficient number, since it is larger than the sum of its proper divisors (75986363).

681533413 is a wasteful number, since it uses less digits than its factorization.

681533413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169075.

The product of its digits is 25920, while the sum is 34.

The square root of 681533413 is about 26106.1949161497. The cubic root of 681533413 is about 880.0264338650.

Adding to 681533413 its reverse (314335186), we get a palindrome (995868599).

The spelling of 681533413 in words is "six hundred eighty-one million, five hundred thirty-three thousand, four hundred thirteen".