999381049 has 2 divisors, whose sum is σ = 999381050. Its totient is φ = 999381048.

The previous prime is 999381029. The next prime is 999381059. The reversal of 999381049 is 940183999.

999381049 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., 776625424 + 222755625 = 27868^2 + 14925^2 .

It is a cyclic number.

It is not a de Polignac number, because 999381049 - 2⁹ = 999380537 is a prime.

It is a super-2 number, since 2×999381049² = 1997524962200680802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 999380987 and 999381005.

It is not a weakly prime, because it can be changed into another prime (999381029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499690524 + 499690525.

It is an arithmetic number, because the mean of its divisors is an integer number (499690525).

Almost surely, 2^999381049 is an apocalyptic number.

It is an amenable number.

999381049 is a deficient number, since it is larger than the sum of its proper divisors (1).

999381049 is an equidigital number, since it uses as much as digits as its factorization.

999381049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 629856, while the sum is 52.

The square root of 999381049 is about 31612.9886122777. The cubic root of 999381049 is about 999.7936404187.

The spelling of 999381049 in words is "nine hundred ninety-nine million, three hundred eighty-one thousand, forty-nine".