740681 has 2 divisors, whose sum is σ = 740682. Its totient is φ = 740680.

The previous prime is 740671. The next prime is 740687. The reversal of 740681 is 186047.

740681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 614656 + 126025 = 784^2 + 355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-740681 is a prime.

It is a super-2 number, since 2×740681² = 1097216687522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 740681.

It is not a weakly prime, because it can be changed into another prime (740687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 370340 + 370341.

It is an arithmetic number, because the mean of its divisors is an integer number (370341).

2⁷⁴⁰⁶⁸¹ is an apocalyptic number.

It is an amenable number.

740681 is a deficient number, since it is larger than the sum of its proper divisors (1).

740681 is an equidigital number, since it uses as much as digits as its factorization.

740681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 740681 is about 860.6282588900. The cubic root of 740681 is about 90.4781547346.

The spelling of 740681 in words is "seven hundred forty thousand, six hundred eighty-one".