719438221 has 2 divisors, whose sum is σ = 719438222. Its totient is φ = 719438220.

The previous prime is 719438219. The next prime is 719438281. The reversal of 719438221 is 122834917.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 672364900 + 47073321 = 25930^2 + 6861^2 .

It is an emirp because it is prime and its reverse (122834917) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 719438221 - 2¹ = 719438219 is a prime.

Together with 719438219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (719438201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359719110 + 359719111.

It is an arithmetic number, because the mean of its divisors is an integer number (359719111).

Almost surely, 2^719438221 is an apocalyptic number.

It is an amenable number.

719438221 is a deficient number, since it is larger than the sum of its proper divisors (1).

719438221 is an equidigital number, since it uses as much as digits as its factorization.

719438221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 719438221 is about 26822.3455536610. The cubic root of 719438221 is about 896.0477813360.

The spelling of 719438221 in words is "seven hundred nineteen million, four hundred thirty-eight thousand, two hundred twenty-one".