740680649 has 2 divisors, whose sum is σ = 740680650. Its totient is φ = 740680648.

The previous prime is 740680609. The next prime is 740680673. The reversal of 740680649 is 946086047.

740680649 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., 434430649 + 306250000 = 20843^2 + 17500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-740680649 is a prime.

It is a super-2 number, since 2×740680649² = 1097215647606122402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (740680609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 370340324 + 370340325.

It is an arithmetic number, because the mean of its divisors is an integer number (370340325).

Almost surely, 2^740680649 is an apocalyptic number.

It is an amenable number.

740680649 is a deficient number, since it is larger than the sum of its proper divisors (1).

740680649 is an equidigital number, since it uses as much as digits as its factorization.

740680649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 740680649 is about 27215.4487194314. The cubic root of 740680649 is about 904.7814044247.

The spelling of 740680649 in words is "seven hundred forty million, six hundred eighty thousand, six hundred forty-nine".