699650644249 has 2 divisors, whose sum is σ = 699650644250. Its totient is φ = 699650644248.

The previous prime is 699650644123. The next prime is 699650644289. The reversal of 699650644249 is 942446056996.

699650644249 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., 499627026649 + 200023617600 = 706843^2 + 447240^2 .

It is a cyclic number.

It is not a de Polignac number, because 699650644249 - 2¹³ = 699650636057 is a prime.

It is a super-2 number, since 2×699650644249² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (699650644289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349825322124 + 349825322125.

It is an arithmetic number, because the mean of its divisors is an integer number (349825322125).

Almost surely, 2^699650644249 is an apocalyptic number.

It is an amenable number.

699650644249 is a deficient number, since it is larger than the sum of its proper divisors (1).

699650644249 is an equidigital number, since it uses as much as digits as its factorization.

699650644249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100776960, while the sum is 64.

The spelling of 699650644249 in words is "six hundred ninety-nine billion, six hundred fifty million, six hundred forty-four thousand, two hundred forty-nine".