719749 has 2 divisors, whose sum is σ = 719750. Its totient is φ = 719748.

The previous prime is 719731. The next prime is 719753. The reversal of 719749 is 947917.

719749 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 669124 + 50625 = 818^2 + 225^2 .

It is an emirp because it is prime and its reverse (947917) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 719749 - 2⁵ = 719717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (719779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359874 + 359875.

It is an arithmetic number, because the mean of its divisors is an integer number (359875).

2⁷¹⁹⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

719749 is a deficient number, since it is larger than the sum of its proper divisors (1).

719749 is an equidigital number, since it uses as much as digits as its factorization.

719749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876, while the sum is 37.

The square root of 719749 is about 848.3802213630. The cubic root of 719749 is about 89.6176786040.

The spelling of 719749 in words is "seven hundred nineteen thousand, seven hundred forty-nine".