719641 has 8 divisors (see below), whose sum is σ = 781704. Its totient is φ = 658560.

The previous prime is 719639. The next prime is 719659. The reversal of 719641 is 146917.

It can be written as a sum of positive squares in 4 ways, for example, as 235225 + 484416 = 485^2 + 696^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 719641 - 2¹ = 719639 is a prime.

It is a Duffinian number.

719641 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (719671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2421 + ... + 2701.

It is an arithmetic number, because the mean of its divisors is an integer number (97713).

2⁷¹⁹⁶⁴¹ is an apocalyptic number.

It is an amenable number.

719641 is a deficient number, since it is larger than the sum of its proper divisors (62063).

719641 is a wasteful number, since it uses less digits than its factorization.

719641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491.

The product of its digits is 1512, while the sum is 28.

The square root of 719641 is about 848.3165682692. The cubic root of 719641 is about 89.6131959333.

The spelling of 719641 in words is "seven hundred nineteen thousand, six hundred forty-one".