719731993 has 2 divisors, whose sum is σ = 719731994. Its totient is φ = 719731992.

The previous prime is 719731931. The next prime is 719732011. The reversal of 719731993 is 399137917.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 556582464 + 163149529 = 23592^2 + 12773^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-719731993 is a prime.

It is not a weakly prime, because it can be changed into another prime (719731093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359865996 + 359865997.

It is an arithmetic number, because the mean of its divisors is an integer number (359865997).

Almost surely, 2^719731993 is an apocalyptic number.

It is an amenable number.

719731993 is a deficient number, since it is larger than the sum of its proper divisors (1).

719731993 is an equidigital number, since it uses as much as digits as its factorization.

719731993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 321489, while the sum is 49.

The square root of 719731993 is about 26827.8212495909. The cubic root of 719731993 is about 896.1697273767.

The spelling of 719731993 in words is "seven hundred nineteen million, seven hundred thirty-one thousand, nine hundred ninety-three".