239306698750681 has 9 divisors (see below), whose sum is σ = 254211893605821. Its totient is φ = 225229586605632.

The previous prime is 239306698750663. The next prime is 239306698750703. The reversal of 239306698750681 is 186057896603932.

The square root of 239306698750681 is 15469541.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 167864647275081 + 71442051475600 = 12956259^2 + 8452340^2 .

It is not a de Polignac number, because 239306698750681 - 2⁵ = 239306698750649 is a prime.

It is a super-2 number, since 2×239306698750681² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239306698750631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 262527211 + ... + 263437183.

Almost surely, 2^{239306698750681} is an apocalyptic number.

239306698750681 is the 15469541-st square number.

239306698750681 is the 7734771-st centered octagonal number.

It is an amenable number.

239306698750681 is a deficient number, since it is larger than the sum of its proper divisors (14905194855140).

239306698750681 is an frugal number, since it uses more digits than its factorization.

239306698750681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819980 (or 909990 counting only the distinct ones).

The product of its (nonzero) digits is 705438720, while the sum is 73.

The spelling of 239306698750681 in words is "two hundred thirty-nine trillion, three hundred six billion, six hundred ninety-eight million, seven hundred fifty thousand, six hundred eighty-one".