507688681 has 8 divisors (see below), whose sum is σ = 521793920. Its totient is φ = 493775568.

The previous prime is 507688651. The next prime is 507688711. The reversal of 507688681 is 186886705.

It is an interprime number because it is at equal distance from previous prime (507688651) and next prime (507688711).

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 507688681 - 2¹¹ = 507686633 is a prime.

It is a super-2 number, since 2×507688681² = 515495593631039522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (507688631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42666 + ... + 53251.

It is an arithmetic number, because the mean of its divisors is an integer number (65224240).

Almost surely, 2^507688681 is an apocalyptic number.

It is an amenable number.

507688681 is a deficient number, since it is larger than the sum of its proper divisors (14105239).

507688681 is an equidigital number, since it uses as much as digits as its factorization.

507688681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96063.

The product of its (nonzero) digits is 645120, while the sum is 49.

The square root of 507688681 is about 22531.9480072186. The cubic root of 507688681 is about 797.7481889851.

It can be divided in two parts, 507688 and 681, that added together give a square (508369 = 713²).

The spelling of 507688681 in words is "five hundred seven million, six hundred eighty-eight thousand, six hundred eighty-one".