1931490073 has 2 divisors, whose sum is σ = 1931490074. Its totient is φ = 1931490072.

The previous prime is 1931490047. The next prime is 1931490079. The reversal of 1931490073 is 3700941391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1426723984 + 504766089 = 37772^2 + 22467^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1931490073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1931490079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 965745036 + 965745037.

It is an arithmetic number, because the mean of its divisors is an integer number (965745037).

Almost surely, 2^1931490073 is an apocalyptic number.

It is an amenable number.

1931490073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1931490073 is an equidigital number, since it uses as much as digits as its factorization.

1931490073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 1931490073 is about 43948.7209483962. The cubic root of 1931490073 is about 1245.3674013400.

The spelling of 1931490073 in words is "one billion, nine hundred thirty-one million, four hundred ninety thousand, seventy-three".