681499365 has 8 divisors (see below), whose sum is σ = 1090399008. Its totient is φ = 363466320.

The previous prime is 681499363. The next prime is 681499367. The reversal of 681499365 is 563994186.

It is an interprime number because it is at equal distance from previous prime (681499363) and next prime (681499367).

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

It is not a de Polignac number, because 681499365 - 2¹ = 681499363 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681499363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22716631 + ... + 22716660.

It is an arithmetic number, because the mean of its divisors is an integer number (136299876).

Almost surely, 2^681499365 is an apocalyptic number.

It is an amenable number.

681499365 is a deficient number, since it is larger than the sum of its proper divisors (408899643).

681499365 is a wasteful number, since it uses less digits than its factorization.

681499365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45433299.

The product of its digits is 1399680, while the sum is 51.

The square root of 681499365 is about 26105.5428022480. The cubic root of 681499365 is about 880.0117788540.

The spelling of 681499365 in words is "six hundred eighty-one million, four hundred ninety-nine thousand, three hundred sixty-five".