31123090003 has 2 divisors, whose sum is σ = 31123090004. Its totient is φ = 31123090002.

The previous prime is 31123089979. The next prime is 31123090007. The reversal of 31123090003 is 30009032113.

It is a strong prime.

It is an emirp because it is prime and its reverse (30009032113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31123090003 - 2²⁵ = 31089535571 is a prime.

It is not a weakly prime, because it can be changed into another prime (31123090007) 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, 15561545001 + 15561545002.

It is an arithmetic number, because the mean of its divisors is an integer number (15561545002).

Almost surely, 2^31123090003 is an apocalyptic number.

31123090003 is a deficient number, since it is larger than the sum of its proper divisors (1).

31123090003 is an equidigital number, since it uses as much as digits as its factorization.

31123090003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 22.

The spelling of 31123090003 in words is "thirty-one billion, one hundred twenty-three million, ninety thousand, three".