1000999949 has 2 divisors, whose sum is σ = 1000999950. Its totient is φ = 1000999948.

The previous prime is 1000999943. The next prime is 1001000027. The reversal of 1000999949 is 9499990001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 963667849 + 37332100 = 31043^2 + 6110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000999949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000999897 and 1000999906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000999943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500499974 + 500499975.

It is an arithmetic number, because the mean of its divisors is an integer number (500499975).

Almost surely, 2^1000999949 is an apocalyptic number.

It is an amenable number.

1000999949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000999949 is an equidigital number, since it uses as much as digits as its factorization.

1000999949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 236196, while the sum is 50.

The square root of 1000999949 is about 31638.5832331348. The cubic root of 1000999949 is about 1000.3332052952. Note that the first 3 decimals are identical.

The spelling of 1000999949 in words is "one billion, nine hundred ninety-nine thousand, nine hundred forty-nine".