1031200019 has 2 divisors, whose sum is σ = 1031200020. Its totient is φ = 1031200018.

The previous prime is 1031199973. The next prime is 1031200033. The reversal of 1031200019 is 9100021301.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031200019 is a prime.

It is a super-2 number, since 2×1031200019² = 2126746958371200722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1031200039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515600009 + 515600010.

It is an arithmetic number, because the mean of its divisors is an integer number (515600010).

Almost surely, 2^1031200019 is an apocalyptic number.

1031200019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031200019 is an equidigital number, since it uses as much as digits as its factorization.

1031200019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1031200019 is about 32112.3032341189. The cubic root of 1031200019 is about 1010.2936828541.

The spelling of 1031200019 in words is "one billion, thirty-one million, two hundred thousand, nineteen".