999007649 has 2 divisors, whose sum is σ = 999007650. Its totient is φ = 999007648.

The previous prime is 999007637. The next prime is 999007651. The reversal of 999007649 is 946700999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 945132049 + 53875600 = 30743^2 + 7340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999007649 is a prime.

Together with 999007651, it forms a pair of twin primes.

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 999007649.

It is not a weakly prime, because it can be changed into another prime (999007619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499503824 + 499503825.

It is an arithmetic number, because the mean of its divisors is an integer number (499503825).

Almost surely, 2^999007649 is an apocalyptic number.

It is an amenable number.

999007649 is a deficient number, since it is larger than the sum of its proper divisors (1).

999007649 is an equidigital number, since it uses as much as digits as its factorization.

999007649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1102248, while the sum is 53.

The square root of 999007649 is about 31607.0822601518. The cubic root of 999007649 is about 999.6691068551.

The spelling of 999007649 in words is "nine hundred ninety-nine million, seven thousand, six hundred forty-nine".