719531993 has 2 divisors, whose sum is σ = 719531994. Its totient is φ = 719531992.

The previous prime is 719531959. The next prime is 719532013. The reversal of 719531993 is 399135917.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 526794304 + 192737689 = 22952^2 + 13883^2 .

It is an emirp because it is prime and its reverse (399135917) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 719531993 - 2¹⁴ = 719515609 is a prime.

It is not a weakly prime, because it can be changed into another prime (719531903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359765996 + 359765997.

It is an arithmetic number, because the mean of its divisors is an integer number (359765997).

Almost surely, 2^719531993 is an apocalyptic number.

It is an amenable number.

719531993 is a deficient number, since it is larger than the sum of its proper divisors (1).

719531993 is an equidigital number, since it uses as much as digits as its factorization.

719531993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 229635, while the sum is 47.

The square root of 719531993 is about 26824.0935168367. The cubic root of 719531993 is about 896.0867101093.

The spelling of 719531993 in words is "seven hundred nineteen million, five hundred thirty-one thousand, nine hundred ninety-three".