913039681 has 2 divisors, whose sum is σ = 913039682. Its totient is φ = 913039680.

The previous prime is 913039679. The next prime is 913039693. The reversal of 913039681 is 186930319.

913039681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 910530625 + 2509056 = 30175^2 + 1584^2 .

It is a cyclic number.

It is not a de Polignac number, because 913039681 - 2¹ = 913039679 is a prime.

It is a super-4 number, since 4×913039681⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 913039679, it forms a pair of twin primes.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456519840 + 456519841.

It is an arithmetic number, because the mean of its divisors is an integer number (456519841).

Almost surely, 2^913039681 is an apocalyptic number.

It is an amenable number.

913039681 is a deficient number, since it is larger than the sum of its proper divisors (1).

913039681 is an equidigital number, since it uses as much as digits as its factorization.

913039681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 913039681 is about 30216.5464770546. The cubic root of 913039681 is about 970.1298869537.

The spelling of 913039681 in words is "nine hundred thirteen million, thirty-nine thousand, six hundred eighty-one".