783641 has 2 divisors, whose sum is σ = 783642. Its totient is φ = 783640.

The previous prime is 783619. The next prime is 783647. The reversal of 783641 is 146387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 640000 + 143641 = 800^2 + 379^2 .

It is a cyclic number.

It is not a de Polignac number, because 783641 - 2¹⁸ = 521497 is a prime.

It is a super-2 number, since 2×783641² = 1228186433762, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (783647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391820 + 391821.

It is an arithmetic number, because the mean of its divisors is an integer number (391821).

2⁷⁸³⁶⁴¹ is an apocalyptic number.

It is an amenable number.

783641 is a deficient number, since it is larger than the sum of its proper divisors (1).

783641 is an equidigital number, since it uses as much as digits as its factorization.

783641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 783641 is about 885.2349970488. The cubic root of 783641 is about 92.1946493163.

The spelling of 783641 in words is "seven hundred eighty-three thousand, six hundred forty-one".