719408749 has 2 divisors, whose sum is σ = 719408750. Its totient is φ = 719408748.

The previous prime is 719408747. The next prime is 719408819. The reversal of 719408749 is 947804917.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 680844649 + 38564100 = 26093^2 + 6210^2 .

It is a cyclic number.

It is not a de Polignac number, because 719408749 - 2¹ = 719408747 is a prime.

Together with 719408747, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (719408741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359704374 + 359704375.

It is an arithmetic number, because the mean of its divisors is an integer number (359704375).

Almost surely, 2^719408749 is an apocalyptic number.

It is an amenable number.

719408749 is a deficient number, since it is larger than the sum of its proper divisors (1).

719408749 is an equidigital number, since it uses as much as digits as its factorization.

719408749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 719408749 is about 26821.7961553659. The cubic root of 719408749 is about 896.0355455479.

The spelling of 719408749 in words is "seven hundred nineteen million, four hundred eight thousand, seven hundred forty-nine".