1000203949 has 2 divisors, whose sum is σ = 1000203950. Its totient is φ = 1000203948.

The previous prime is 1000203929. The next prime is 1000203961. The reversal of 1000203949 is 9493020001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 995718025 + 4485924 = 31555^2 + 2118^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000203949 - 2⁷ = 1000203821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000203929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500101974 + 500101975.

It is an arithmetic number, because the mean of its divisors is an integer number (500101975).

Almost surely, 2^1000203949 is an apocalyptic number.

It is an amenable number.

1000203949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000203949 is an equidigital number, since it uses as much as digits as its factorization.

1000203949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1000203949 is about 31626.0011541137. The cubic root of 1000203949 is about 1000.0679783788.

The spelling of 1000203949 in words is "one billion, two hundred three thousand, nine hundred forty-nine".