780469 has 2 divisors, whose sum is σ = 780470. Its totient is φ = 780468.

The previous prime is 780457. The next prime is 780499. The reversal of 780469 is 964087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 438244 + 342225 = 662^2 + 585^2 .

It is a cyclic number.

It is not a de Polignac number, because 780469 - 2¹⁹ = 256181 is a prime.

It is a super-2 number, since 2×780469² = 1218263719922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (780499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390234 + 390235.

It is an arithmetic number, because the mean of its divisors is an integer number (390235).

2⁷⁸⁰⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

780469 is a deficient number, since it is larger than the sum of its proper divisors (1).

780469 is an equidigital number, since it uses as much as digits as its factorization.

780469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 780469 is about 883.4415656963. The cubic root of 780469 is about 92.0700867950.

The spelling of 780469 in words is "seven hundred eighty thousand, four hundred sixty-nine".