720682987 has 2 divisors, whose sum is σ = 720682988. Its totient is φ = 720682986.

The previous prime is 720682979. The next prime is 720682993. The reversal of 720682987 is 789286027.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 720682987 - 2³ = 720682979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 720682987.

It is not a weakly prime, because it can be changed into another prime (720682387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360341493 + 360341494.

It is an arithmetic number, because the mean of its divisors is an integer number (360341494).

Almost surely, 2^720682987 is an apocalyptic number.

720682987 is a deficient number, since it is larger than the sum of its proper divisors (1).

720682987 is an equidigital number, since it uses as much as digits as its factorization.

720682987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 720682987 is about 26845.5394246419. The cubic root of 720682987 is about 896.5642617090.

The spelling of 720682987 in words is "seven hundred twenty million, six hundred eighty-two thousand, nine hundred eighty-seven".