1203131999 has 2 divisors, whose sum is σ = 1203132000. Its totient is φ = 1203131998.

The previous prime is 1203131983. The next prime is 1203132011. The reversal of 1203131999 is 9991313021.

It is a strong prime.

It is an emirp because it is prime and its reverse (9991313021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1203131999 - 2⁴ = 1203131983 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203131299) 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, 601565999 + 601566000.

It is an arithmetic number, because the mean of its divisors is an integer number (601566000).

Almost surely, 2^1203131999 is an apocalyptic number.

1203131999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203131999 is an equidigital number, since it uses as much as digits as its factorization.

1203131999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 1203131999 is about 34686.1932042131. The cubic root of 1203131999 is about 1063.5822786811.

The spelling of 1203131999 in words is "one billion, two hundred three million, one hundred thirty-one thousand, nine hundred ninety-nine".