780004429 has 2 divisors, whose sum is σ = 780004430. Its totient is φ = 780004428.

The previous prime is 780004411. The next prime is 780004439. The reversal of 780004429 is 924400087.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 469892329 + 310112100 = 21677^2 + 17610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-780004429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 780004394 and 780004403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (780004439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390002214 + 390002215.

It is an arithmetic number, because the mean of its divisors is an integer number (390002215).

Almost surely, 2^780004429 is an apocalyptic number.

It is an amenable number.

780004429 is a deficient number, since it is larger than the sum of its proper divisors (1).

780004429 is an equidigital number, since it uses as much as digits as its factorization.

780004429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 780004429 is about 27928.5593792448. The cubic root of 780004429 is about 920.5181505420.

The spelling of 780004429 in words is "seven hundred eighty million, four thousand, four hundred twenty-nine".